NAME
    BusyBox - The Swiss Army Knife of Embedded Linux

SYNTAX
     BusyBox <function> [arguments...]  # or

     <function> [arguments...]          # if symlinked

DESCRIPTION
    BusyBox combines tiny versions of many common UNIX utilities
    into a single small executable. It provides minimalist
    replacements for most of the utilities you usually find in
    fileutils, shellutils, findutils, textutils, grep, gzip, tar,
    etc. BusyBox provides a fairly complete POSIX environment for
    any small or embedded system. The utilities in BusyBox generally
    have fewer options than their full-featured GNU cousins;
    however, the options that are included provide the expected
    functionality and behave very much like their GNU counterparts.

    BusyBox has been written with size-optimization and limited
    resources in mind. It is also extremely modular so you can
    easily include or exclude commands (or features) at compile
    time. This makes it easy to customize your embedded systems. To
    create a working system, just add a kernel, a shell (such as
    ash), and an editor (such as elvis-tiny or ae).

USAGE
    When you create a link to BusyBox for the function you wish to
    use, when BusyBox is called using that link it will behave as if
    the command itself has been invoked.

    For example, entering

            ln -s ./BusyBox ls
            ./ls

    will cause BusyBox to behave as 'ls' (if the 'ls' command has
    been compiled into BusyBox).

    You can also invoke BusyBox by issuing the command as an
    argument on the command line. For example, entering

            ./BusyBox ls

    will also cause BusyBox to behave as 'ls'.

COMMON OPTIONS
    Most BusyBox commands support the --help option to provide a
    terse runtime description of their behavior.

COMMANDS
    Currently defined functions include:

    ar, basename, busybox, cat, chgrp, chmod, chown, chroot, chvt,
    clear, cmp, cp, cut, date, dc, dd, deallocvt, df, dirname,
    dmesg, dos2unix, dpkg, dpkg-deb, du, dumpkmap, dutmp, echo,
    expr, false, fbset, fdflush, find, free, freeramdisk,
    fsck.minix, getopt, grep, gunzip, gzip, halt, head, hostid,
    hostname, id, ifconfig, init, insmod, kill, killall, klogd,
    length, ln, loadacm, loadfont, loadkmap, logger, logname, ls,
    lsmod, makedevs, md5sum, mkdir, mkfifo, mkfs.minix, mknod,
    mkswap, mktemp, more, mount, mt, mv, nc, nslookup, ping,
    pivot_root, poweroff, printf, ps, pwd, rdate, readlink, reboot,
    renice, reset, rm, rmdir, rmmod, route, rpmunpack, sed,
    setkeycodes, sh, sleep, sort, stty, swapoff, swapon, sync,
    syslogd, tail, tar, tee, telnet, test, tftp, touch, tr, true,
    tty, umount, uname, uniq, unix2dos, update, uptime, usleep,
    uudecode, uuencode, watchdog, wc, wget, which, whoami, xargs,
    yes, zcat, [

    adjtimex
        adjtimex [-q] [-o offset] [-f frequency] [-p timeconstant]
        [-t tick]

        Reads and optionally sets system timebase parameters. See
        adjtimex(2).

        Options:

                -q              quiet mode - do not print
                -o offset       time offset, microseconds
                -f frequency    frequency adjust, integer kernel units (65536 is 1ppm)
                                (positive values make the system clock run fast)
                -t tick         microseconds per tick, usually 10000
                -p timeconstant

        -------------------------------

    ar  ar -[ovR]{ptx} archive filenames

        Extract or list files from an ar archive.

        Options:

                -o              preserve original dates
                -p              extract to stdout
                -t              list
                -x              extract
                -v              verbosely list files processed
                -R              recursive action

        -------------------------------

    basename
        basename FILE [SUFFIX]

        Strips directory path and suffixes from FILE. If specified,
        also removes any trailing SUFFIX.

        Example:

                $ basename /usr/local/bin/foo
                foo
                $ basename /usr/local/bin/
                bin
                $ basename /foo/bar.txt .txt
                bar

        -------------------------------

    cat cat [FILE]...

        Concatenates FILE(s) and prints them to stdout.

        Example:

                $ cat /proc/uptime
                110716.72 17.67

        -------------------------------

    chgrp
        chgrp [OPTION]... GROUP FILE...

        Change the group membership of each FILE to GROUP.

        Options:

                -R      Changes files and directories recursively.

        Example:

                $ ls -l /tmp/foo
                -r--r--r--    1 andersen andersen        0 Apr 12 18:25 /tmp/foo
                $ chgrp root /tmp/foo
                $ ls -l /tmp/foo
                -r--r--r--    1 andersen root            0 Apr 12 18:25 /tmp/foo

        -------------------------------

    chmod
        chmod [-R] MODE[,MODE]... FILE...

        Each MODE is one or more of the letters ugoa, one of the
        symbols +-= and one or more of the letters rwxst.

        Options:

                -R      Changes files and directories recursively.

        Example:

                $ ls -l /tmp/foo
                -rw-rw-r--    1 root     root            0 Apr 12 18:25 /tmp/foo
                $ chmod u+x /tmp/foo
                $ ls -l /tmp/foo
                -rwxrw-r--    1 root     root            0 Apr 12 18:25 /tmp/foo*
                $ chmod 444 /tmp/foo
                $ ls -l /tmp/foo
                -r--r--r--    1 root     root            0 Apr 12 18:25 /tmp/foo

        -------------------------------

    chown
        chown [OPTION]... OWNER[<.|:>[GROUP]] FILE...

        Change the owner and/or group of each FILE to OWNER and/or
        GROUP.

        Options:

                -R      Changes files and directories recursively.

        Example:

                $ ls -l /tmp/foo
                -r--r--r--    1 andersen andersen        0 Apr 12 18:25 /tmp/foo
                $ chown root /tmp/foo
                $ ls -l /tmp/foo
                -r--r--r--    1 root     andersen        0 Apr 12 18:25 /tmp/foo
                $ chown root.root /tmp/foo
                ls -l /tmp/foo
                -r--r--r--    1 root     root            0 Apr 12 18:25 /tmp/foo

        -------------------------------

    chroot
        chroot NEWROOT [COMMAND...]

        Run COMMAND with root directory set to NEWROOT.

        Example:

                $ ls -l /bin/ls
                lrwxrwxrwx    1 root     root          12 Apr 13 00:46 /bin/ls -> /BusyBox
                $ mount /dev/hdc1 /mnt -t minix
                $ chroot /mnt
                $ ls -l /bin/ls
                -rwxr-xr-x    1 root     root        40816 Feb  5 07:45 /bin/ls*

        -------------------------------

    chvt
        chvt N

        Changes the foreground virtual terminal to /dev/ttyN

        -------------------------------

    clear
        clear

        Clear screen.

        -------------------------------

    cmp cmp FILE1 [FILE2]

        Compare files.

        -------------------------------

    cp  cp [OPTION]... SOURCE DEST

        Copies SOURCE to DEST, or multiple SOURCE(s) to DIRECTORY.

                -a      Same as -dpR
                -d      Preserves links
                -p      Preserves file attributes if possible
                -f      force (implied; ignored) - always set
                -R      Copies directories recursively

        -------------------------------

    cut cut [OPTION]... [FILE]...

        Prints selected fields from each input FILE to standard
        output.

        Options:

                -b LIST         Output only bytes from LIST
                -c LIST         Output only characters from LIST
                -d CHAR         Use CHAR instead of tab as the field delimiter
                -s              Output only the lines containing delimiter
                -f N            Print only these fields
                -n              Ignored

        Example:

                $ echo "Hello world" | cut -f 1 -d ' '
                Hello
                $ echo "Hello world" | cut -f 2 -d ' '
                world

        -------------------------------

    date
        date [OPTION]... [+FORMAT]

        Displays the current time in the given FORMAT, or sets the
        system date.

        Options:

                -R              Outputs RFC-822 compliant date string
                -d STRING       display time described by STRING, not `now'
                -s              Sets time described by STRING
                -u              Prints or sets Coordinated Universal Time

        Example:

                $ date
                Wed Apr 12 18:52:41 MDT 2000

        -------------------------------

    dc  dc expression ...

        This is a Tiny RPN calculator that understands the following
        operations: +, -, /, *, and, or, not, eor. i.e. 'dc 2 2 add'
        -> 4, and 'dc 8 8 \* 2 2 + /' -> 16

        Example:

                $ dc 2 2 +
                4
                $ dc 8 8 * 2 2 + /
                16
                $ dc 0 1 and
                0
                $ dc 0 1 or
                1
                $ echo 72 9 div 8 mul | dc
                64

        -------------------------------

    dd  dd [if=FILE] [of=FILE] [bs=N] [count=N] [skip=N] [seek=N]
        [conv=notrunc|sync]

        Copy a file, converting and formatting according to options

                if=FILE         read from FILE instead of stdin
                of=FILE         write to FILE instead of stdout
                bs=N            read and write N bytes at a time
                count=N         copy only N input blocks
                skip=N          skip N input blocks
                seek=N          skip N output blocks
                conv=notrunc    don't truncate output file
                conv=sync       pad blocks with zeros

        Numbers may be suffixed by c (x1), w (x2), b (x512), kD
        (x1000), k (x1024), MD (x1000000), M (x1048576), GD
        (x1000000000) or G (x1073741824).

        Example:

                $ dd if=/dev/zero of=/dev/ram1 bs=1M count=4
                4+0 records in
                4+0 records out

        -------------------------------

    deallocvt
        deallocvt N

        Deallocate unused virtual terminal /dev/ttyN

        -------------------------------

    df  df [-hmk] [filesystem ...]

        Print the filesystem space used and space available.

        Options:

                -h      print sizes in human readable format (e.g., 1K 243M 2G )
                -m      print sizes in megabytes
                -k      print sizes in kilobytes(default)

        Example:

                $ df
                Filesystem           1k-blocks      Used Available Use% Mounted on
                /dev/sda3              8690864   8553540    137324  98% /
                /dev/sda1                64216     36364     27852  57% /boot
                $ df /dev/sda3
                Filesystem           1k-blocks      Used Available Use% Mounted on
                /dev/sda3              8690864   8553540    137324  98% /

        -------------------------------

    dirname
        dirname [FILENAME ...]

        Strips non-directory suffix from FILENAME

        Example:

                $ dirname /tmp/foo
                /tmp
                $ dirname /tmp/foo/
                /tmp

        -------------------------------

    dmesg
        dmesg [-c] [-n LEVEL] [-s SIZE]

        Prints or controls the kernel ring buffer

        Options:

                -c              Clears the ring buffer's contents after printing
                -n LEVEL        Sets console logging level
                -s SIZE         Use a buffer of size SIZE

        -------------------------------

    dos2unix
        dos2unix [option] [file]

        Converts a text file to/from dos format to unix format.

        Options:

                -u      output will be in UNIX format
                -d      output will be in DOS format

        - when no option is given then input format will be
        automaticaly detected

          and converted to the oposite format on output
        - when no file is given, then stdin is used as input and stdout as output

        -------------------------------

    dpkg
        dpkg [-i|-r|--unpack|--configure] my.deb

        WORK IN PROGRESS, only usefull for debian-installer

        -------------------------------

    dpkg_deb
        dpkg_deb [-cexX] file directory

        Perform actions on debian packages (.debs)

        Options:

                -c      List contents of filesystem tree (verbose)
                -l      List contents of filesystem tree (.list format)
                -e      Extract control files to directory
                -x      Exctract packages filesystem tree to directory
                -X      Verbose extract

        Example:

                $ dpkg-deb -X ./busybox_0.48-1_i386.deb /tmp

        -------------------------------

    du  du [-lshmk] [FILE]...

        Summarizes disk space used for each FILE and/or directory.
        Disk space is printed in units of 1024 bytes.

        Options:

                -l      count sizes many times if hard linked
                -s      display only a total for each argument
                -h      print sizes in human readable format (e.g., 1K 243M 2G )
                -m      print sizes in megabytes
                -k      print sizes in kilobytes(default)

        Example:

                $ du
                16      ./CVS
                12      ./kernel-patches/CVS
                80      ./kernel-patches
                12      ./tests/CVS
                36      ./tests
                12      ./scripts/CVS
                16      ./scripts
                12      ./docs/CVS
                104     ./docs
                2417    .

        -------------------------------

    dumpkmap
        dumpkmap > keymap

        Prints out a binary keyboard translation table to standard
        output.

        Example:

                $ dumpkmap > keymap

        -------------------------------

    dutmp
        dutmp [FILE]

        Dump utmp file format (pipe delimited) from FILE or stdin to
        stdout. (i.e. 'dutmp /var/run/utmp')

        Example:

                $ dutmp /var/run/utmp
                8|7||si|||0|0|0|955637625|760097|0
                2|0|~|~~|reboot||0|0|0|955637625|782235|0
                1|20020|~|~~|runlevel||0|0|0|955637625|800089|0
                8|125||l4|||0|0|0|955637629|998367|0
                6|245|tty1|1|LOGIN||0|0|0|955637630|998974|0
                6|246|tty2|2|LOGIN||0|0|0|955637630|999498|0
                7|336|pts/0|vt00andersen|andersen|:0.0|0|0|0|955637763|0|0

        -------------------------------

    echo
        echo [-neE] [ARG ...]

        Prints the specified ARGs to stdout

        Options:

                -n      suppress trailing newline
                -e      interpret backslash-escaped characters (i.e. \t=tab etc)
                -E      disable interpretation of backslash-escaped characters

        Example:

                $ echo "Erik is cool"
                Erik is cool
                $  echo -e "Erik
                is
                cool"
                Erik
                is
                cool
                $ echo "Erik
                is
                cool"
                Erik
                is
                cool

        -------------------------------

    env env [-] [-iu] [name=value ...] [command]

        Prints the current environment or runs a program after
        setting up the specified environment.

        Options:

                -, -i   start with an empty environment
                -u      remove variable from the environment

        -------------------------------

    expr
        expr EXPRESSION

        Prints the value of EXPRESSION to standard output.

        EXPRESSION may be:

                ARG1 |  ARG2    ARG1 if it is neither null nor 0, otherwise ARG2
                ARG1 &  ARG2    ARG1 if neither argument is null or 0, otherwise 0
                ARG1 <  ARG2    ARG1 is less than ARG2
                ARG1 <= ARG2    ARG1 is less than or equal to ARG2
                ARG1 =  ARG2    ARG1 is equal to ARG2
                ARG1 != ARG2    ARG1 is unequal to ARG2
                ARG1 >= ARG2    ARG1 is greater than or equal to ARG2
                ARG1 >  ARG2    ARG1 is greater than ARG2
                ARG1 +  ARG2    arithmetic sum of ARG1 and ARG2
                ARG1 -  ARG2    arithmetic difference of ARG1 and ARG2
                ARG1 *  ARG2    arithmetic product of ARG1 and ARG2
                ARG1 /  ARG2    arithmetic quotient of ARG1 divided by ARG2
                ARG1 %  ARG2    arithmetic remainder of ARG1 divided by ARG2
                STRING : REGEXP             anchored pattern match of REGEXP in STRING
                match STRING REGEXP         same as STRING : REGEXP
                substr STRING POS LENGTH    substring of STRING, POS counted from 1
                index STRING CHARS          index in STRING where any CHARS is found,
                                            or 0
                length STRING               length of STRING
                quote TOKEN                 interpret TOKEN as a string, even if
                                            it is a keyword like `match' or an
                                            operator like `/'
                ( EXPRESSION )              value of EXPRESSION

        Beware that many operators need to be escaped or quoted for
        shells. Comparisons are arithmetic if both ARGs are numbers,
        else lexicographical. Pattern matches return the string
        matched between \( and \) or null; if \( and \) are not
        used, they return the number of characters matched or 0.

        -------------------------------

    false
        false

        Return an exit code of FALSE (1).

        Example:

                $ false
                $ echo $?
                1

        -------------------------------

    fbset
        fbset [options] [mode]

        Show and modify frame buffer settings

        Example:

                $ fbset
                mode "1024x768-76"
                        # D: 78.653 MHz, H: 59.949 kHz, V: 75.694 Hz
                        geometry 1024 768 1024 768 16
                        timings 12714 128 32 16 4 128 4
                        accel false
                        rgba 5/11,6/5,5/0,0/0
                endmode

        -------------------------------

    fdflush
        fdflush DEVICE

        Forces floppy disk drive to detect disk change

        -------------------------------

    find
        find [PATH...] [EXPRESSION]

        Search for files in a directory hierarchy. The default PATH
        is the current directory; default EXPRESSION is '-print'

        EXPRESSION may consist of:

                -follow         Dereference symbolic links.
                -name PATTERN   File name (leading directories removed) matches PATTERN.        -print          Print (default and assumed).

                -type X         Filetype matches X (where X is one of: f,d,l,b,c,...)
                -perm PERMS     Permissions match any of (+NNN); all of (-NNN);
                                or exactly (NNN)
                -mtime TIME     Modified time is greater than (+N); less than (-N);
                                or exactly (N) days

        Example:

                $ find / -name /etc/passwd
                /etc/passwd

        -------------------------------

    free
        free

        Displays the amount of free and used system memory

        Example:

                $ free
                              total         used         free       shared      buffers
                  Mem:       257628       248724         8904        59644        93124
                 Swap:       128516         8404       120112
                Total:       386144       257128       129016

        -------------------------------

    freeramdisk
        freeramdisk DEVICE

        Frees all memory used by the specified ramdisk.

        Example:

                $ freeramdisk /dev/ram2

        -------------------------------

    fsck_minix
        fsck_minix [-larvsmf] /dev/name

        Performs a consistency check for MINIX filesystems.

        Options:

                -l      Lists all filenames
                -r      Perform interactive repairs
                -a      Perform automatic repairs
                -v      verbose
                -s      Outputs super-block information
                -m      Activates MINIX-like "mode not cleared" warnings
                -f      Force file system check.

        -------------------------------

    getopt
        getopt [OPTIONS]...

        Parse command options

                -a, --alternative               Allow long options starting with single -
                -l, --longoptions=longopts      Long options to be recognized
                -n, --name=progname             The name under which errors are reported
                -o, --options=optstring Short options to be recognized
                -q, --quiet                     Disable error reporting by getopt(3)
                -Q, --quiet-output              No normal output
                -s, --shell=shell               Set shell quoting conventions
                -T, --test                      Test for getopt(1) version
                -u, --unqote                    Do not quote the output

        Example:

                $ cat getopt.test
                #!/bin/sh
                GETOPT=`getopt -o ab:c:: --long a-long,b-long:,c-long:: \
                       -n 'example.busybox' -- "$@"`
                if [ $? != 0 ] ; then  exit 1 ; fi
                eval set -- "$GETOPT"
                while true ; do
                 case $1 in
                   -a|--a-long) echo "Option a" ; shift ;;
                   -b|--b-long) echo "Option b, argument `$2'" ; shift 2 ;;
                   -c|--c-long)
                     case "$2" in
                       "") echo "Option c, no argument"; shift 2 ;;
                       *)  echo "Option c, argument `$2'" ; shift 2 ;;
                     esac ;;
                   --) shift ; break ;;
                   *) echo "Internal error!" ; exit 1 ;;
                 esac
                done

        -------------------------------

    grep
        grep [-ihHnqvs] pattern [files...]

        Search for PATTERN in each FILE or standard input.

        Options:

                -H      prefix output lines with filename where match was found
                -h      suppress the prefixing filename on output
                -i      ignore case distinctions
                -l      list names of files that match
                -n      print line number with output lines
                -q      be quiet. Returns 0 if result was found, 1 otherwise
                -v      select non-matching lines
                -s      suppress file open/read error messages

        Example:

                $ grep root /etc/passwd
                root:x:0:0:root:/root:/bin/bash
                $ grep ^[rR]oo. /etc/passwd
                root:x:0:0:root:/root:/bin/bash

        -------------------------------

    gunzip
        gunzip [OPTION]... FILE

        Uncompress FILE (or standard input if FILE is '-').

        Options:

                -c      Write output to standard output
                -t      Test compressed file integrity

        Example:

                $ ls -la /tmp/BusyBox*
                -rw-rw-r--    1 andersen andersen   557009 Apr 11 10:55 /tmp/BusyBox-0.43.tar.gz
                $ gunzip /tmp/BusyBox-0.43.tar.gz
                $ ls -la /tmp/BusyBox*
                -rw-rw-r--    1 andersen andersen  1761280 Apr 14 17:47 /tmp/BusyBox-0.43.tar

        -------------------------------

    gzip
        gzip [OPTION]... FILE

        Compress FILE with maximum compression. When FILE is '-',
        reads standard input. Implies -c.

        Options:

                -c      Write output to standard output instead of FILE.gz
                -d      decompress

        Example:

                $ ls -la /tmp/BusyBox*
                -rw-rw-r--    1 andersen andersen  1761280 Apr 14 17:47 /tmp/BusyBox-0.43.tar
                $ gzip /tmp/BusyBox-0.43.tar
                $ ls -la /tmp/BusyBox*
                -rw-rw-r--    1 andersen andersen   554058 Apr 14 17:49 /tmp/BusyBox-0.43.tar.gz

        -------------------------------

    halt
        halt

        Halt the system.

        -------------------------------

    head
        head [OPTION] [FILE]...

        Print first 10 lines of each FILE to standard output. With
        more than one FILE, precede each with a header giving the
        file name. With no FILE, or when FILE is -, read standard
        input.

        Options:

                -n NUM          Print first NUM lines instead of first 10

        Example:

                $ head -n 2 /etc/passwd
                root:x:0:0:root:/root:/bin/bash
                daemon:x:1:1:daemon:/usr/sbin:/bin/sh

        -------------------------------

    hostid
        hostid

        Print out a unique 32-bit identifier for the machine.

        -------------------------------

    hostname
        hostname [OPTION] {hostname | -F file}

        Get or set the hostname or DNS domain name. If a hostname is
        given (or a file with the -F parameter), the host name will
        be set.

        Options:

                -s              Short
                -i              Addresses for the hostname
                -d              DNS domain name
                -F, --file FILE Use the contents of FILE to specify the hostname

        Example:

                $ hostname
                slag 

        -------------------------------

    id  id [OPTIONS]... [USERNAME]

        Print information for USERNAME or the current user

        Options:

                -g      prints only the group ID
                -u      prints only the user ID
                -n      print a name instead of a number (with for -ug)
                -r      prints the real user ID instead of the effective ID (with -ug)

        Example:

                $ id
                uid=1000(andersen) gid=1000(andersen)

        -------------------------------

    ifconfig
        ifconfig [-a] <interface> [<address>]

        configure a network interface

        Options:

                [[-]broadcast [<address>]]  [[-]pointopoint [<address>]]
                [netmask <address>]  [dstaddr <address>]
                [outfill <NN>] [keepalive <NN>]
                [hw ether <address>]  [metric <NN>]  [mtu <NN>]
                [[-]trailers]  [[-]arp]  [[-]allmulti]
                [multicast]  [[-]promisc]  [txqueuelen <NN>]  [[-]dynamic]
                [mem_start <NN>]  [io_addr <NN>]  [irq <NN>]
                [up|down] ...

        -------------------------------

    init
        init

        Init is the parent of all processes.

        This version of init is designed to be run only by the
        kernel.

        BusyBox init doesn't support multiple runlevels. The
        runlevels field of the /etc/inittab file is completely
        ignored by BusyBox init. If you want runlevels, use
        sysvinit.

        BusyBox init works just fine without an inittab. If no
        inittab is found, it has the following default behavior:

                ::sysinit:/etc/init.d/rcS
                ::askfirst:/bin/sh
                ::ctrlaltdel:/sbin/reboot
                ::shutdown:/sbin/swapoff -a
                ::shutdown:/bin/umount -a -r

        if it detects that /dev/console is _not_ a serial console,
        it will also run:

                tty2::askfirst:/bin/sh
                tty3::askfirst:/bin/sh
                tty4::askfirst:/bin/sh

        If you choose to use an /etc/inittab file, the inittab entry
        format is as follows:

                <id>:<runlevels>:<action>:<process>

                <id>: 

                        WARNING: This field has a non-traditional meaning for BusyBox init!
                        The id field is used by BusyBox init to specify the controlling tty for
                        the specified process to run on.  The contents of this field are
                        appended to "/dev/" and used as-is.  There is no need for this field to
                        be unique, although if it isn't you may have strange results.  If this
                        field is left blank, the controlling tty is set to the console.  Also
                        note that if BusyBox detects that a serial console is in use, then only
                        entries whose controlling tty is either the serial console or /dev/null
                        will be run.  BusyBox init does nothing with utmp.  We don't need no
                        stinkin' utmp.

                <runlevels>: 

                        The runlevels field is completely ignored.

                <action>: 

                        Valid actions include: sysinit, respawn, askfirst, wait, 
                        once, ctrlaltdel, and shutdown.

                        The available actions can be classified into two groups: actions
                        that are run only once, and actions that are re-run when the specified
                        process exits.

                        Run only-once actions:

                                'sysinit' is the first item run on boot.  init waits until all
                                sysinit actions are completed before continuing.  Following the
                                completion of all sysinit actions, all 'wait' actions are run.
                                'wait' actions, like  'sysinit' actions, cause init to wait until
                                the specified task completes.  'once' actions are asyncronous,
                                therefore, init does not wait for them to complete.  'ctrlaltdel'
                                actions are run when the system detects that someone on the system
                               console has pressed the CTRL-ALT-DEL key combination.  Typically one
                               wants to run 'reboot' at this point to cause the system to reboot.
                                Finally the 'shutdown' action specifies the actions to taken when
                               init is told to reboot.  Unmounting filesystems and disabling swap
                               is a very good here

                        Run repeatedly actions:

                                'respawn' actions are run after the 'once' actions.  When a process
                                started with a 'respawn' action exits, init automatically restarts
                                it.  Unlike sysvinit, BusyBox init does not stop processes from
                                respawning out of control.  The 'askfirst' actions acts just like
                                respawn, except that before running the specified process it
                                displays the line "Please press Enter to activate this console."
                                and then waits for the user to press enter before starting the
                                specified process.  

                        Unrecognized actions (like initdefault) will cause init to emit an
                        error message, and then go along with its business.  All actions are
                        run in the reverse order from how they appear in /etc/inittab.

                <process>: 

                        Specifies the process to be executed and it's command line.

        Example /etc/inittab file:

                # This is run first except when booting in single-user mode.
                #
                ::sysinit:/etc/init.d/rcS
                
                # /bin/sh invocations on selected ttys
                #
                # Start an "askfirst" shell on the console (whatever that may be)
                ::askfirst:-/bin/sh
                # Start an "askfirst" shell on /dev/tty2-4
                tty2::askfirst:-/bin/sh
                tty3::askfirst:-/bin/sh
                tty4::askfirst:-/bin/sh
                
                # /sbin/getty invocations for selected ttys
                #
                tty4::respawn:/sbin/getty 38400 tty5
                tty5::respawn:/sbin/getty 38400 tty6
                
                
                # Example of how to put a getty on a serial line (for a terminal)
                #
                #::respawn:/sbin/getty -L ttyS0 9600 vt100
                #::respawn:/sbin/getty -L ttyS1 9600 vt100
                #
                # Example how to put a getty on a modem line.
                #::respawn:/sbin/getty 57600 ttyS2
                
                # Stuff to do before rebooting
                ::ctrlaltdel:/sbin/reboot
                ::shutdown:/bin/umount -a -r
                ::shutdown:/sbin/swapoff -a

        -------------------------------

    insmod
        insmod [OPTION]... MODULE [symbol=value]...

        Loads the specified kernel modules into the kernel.

        Options:

                -f      Force module to load into the wrong kernel version.
                -k      Make module autoclean-able.
                -v      verbose output
                -L      Lock to prevent simultaneous loads of a module
                -x      do not export externs

        -------------------------------

    kill
        kill [-signal] process-id [process-id ...]

        Send a signal (default is SIGTERM) to the specified
        process(es).

        Options:

                -l      List all signal names and numbers.

        Example:

                $ ps | grep apache
                252 root     root     S [apache]
                263 www-data www-data S [apache]
                264 www-data www-data S [apache]
                265 www-data www-data S [apache]
                266 www-data www-data S [apache]
                267 www-data www-data S [apache]
                $ kill 252

        -------------------------------

    killall
        killall [-signal] process-name [process-name ...]

        Send a signal (default is SIGTERM) to the specified
        process(es).

        Options:

                -l      List all signal names and numbers.

        Example:

                $ killall apache

        -------------------------------

    klogd
        klogd -n

        Kernel logger. Options:

                -n      Run as a foreground process.

        -------------------------------

    length
        length STRING

        Prints out the length of the specified STRING.

        Example:

                $ length "Hello"
                5

        -------------------------------

    ln  ln [OPTION] TARGET... LINK_NAME|DIRECTORY

        Create a link named LINK_NAME or DIRECTORY to the specified
        TARGET

        You may use '--' to indicate that all following arguments
        are non-options.

        Options:

                -s      make symbolic links instead of hard links
                -f      remove existing destination files
                -n      no dereference symlinks - treat like normal file

        Example:

                $ ln -s BusyBox /tmp/ls
                $ ls -l /tmp/ls
                lrwxrwxrwx    1 root     root            7 Apr 12 18:39 ls -> BusyBox*

        -------------------------------

    loadacm
        loadacm < mapfile

        Loads an acm from standard input.

        Example:

                $ loadacm < /etc/i18n/acmname

        -------------------------------

    loadfont
        loadfont < font

        Loads a console font from standard input.

        Example:

                $ loadfont < /etc/i18n/fontname

        -------------------------------

    loadkmap
        loadkmap < keymap

        Loads a binary keyboard translation table from standard
        input.

        Example:

                $ loadkmap < /etc/i18n/lang-keymap

        -------------------------------

    logger
        logger [OPTION]... [MESSAGE]

        Write MESSAGE to the system log. If MESSAGE is omitted, log
        stdin.

        Options:

                -s      Log to stderr as well as the system log.
                -t      Log using the specified tag (defaults to user name).
                -p      Enter the message with the specified priority.
                        This may be numerical or a ``facility.level'' pair.

        Example:

                $ logger "hello"

        -------------------------------

    logname
        logname

        Print the name of the current user.

        Example:

                $ logname
                root

        -------------------------------

    logread
        logread

        Shows the messages from syslogd (using circular buffer).

        -------------------------------

    ls  ls [-1AacCdeFilnpLRrSsTtuvwxXhk] [filenames...]

        List directory contents

        Options:

                -1      list files in a single column
                -A      do not list implied . and ..
                -a      do not hide entries starting with .
                -C      list entries by columns
                -c      with -l: show ctime
                -d      list directory entries instead of contents
                -e      list both full date and full time
                -F      append indicator (one of */=@|) to entries
                -i      list the i-node for each file
                -l      use a long listing format
                -n      list numeric UIDs and GIDs instead of names
                -p      append indicator (one of /=@|) to entries
                -L      list entries pointed to by symbolic links
                -R      list subdirectories recursively
                -r      sort the listing in reverse order
                -S      sort the listing by file size
                -s      list the size of each file, in blocks
                -T NUM  assume Tabstop every NUM columns
                -t      with -l: show modification time
                -u      with -l: show access time
                -v      sort the listing by version
                -w NUM  assume the terminal is NUM columns wide
                -x      list entries by lines instead of by columns
                -X      sort the listing by extension
                -h      print sizes in human readable format (e.g., 1K 243M 2G )
                -k      print sizes in kilobytes(default)

        -------------------------------

    lsmod
        lsmod

        List the currently loaded kernel modules.

        -------------------------------

    makedevs
        makedevs NAME TYPE MAJOR MINOR FIRST LAST [s]

        Creates a range of block or character special files

        TYPEs include:

                b:      Make a block (buffered) device.
                c or u: Make a character (un-buffered) device.
                p:      Make a named pipe. MAJOR and MINOR are ignored for named pipes.

        FIRST specifies the number appended to NAME to create the
        first device. LAST specifies the number of the last item
        that should be created. If 's' is the last argument, the
        base device is created as well.

        For example:

                makedevs /dev/ttyS c 4 66 2 63   ->  ttyS2-ttyS63
                makedevs /dev/hda b 3 0 0 8 s    ->  hda,hda1-hda8

        Example:

                $ makedevs /dev/ttyS c 4 66 2 63
                [creates ttyS2-ttyS63]
                $ makedevs /dev/hda b 3 0 0 8 s
                [creates hda,hda1-hda8]

        -------------------------------

    md5sum
        md5sum [OPTION] [FILE]... or: md5sum [OPTION] -c [FILE]

        Print or check MD5 checksums.

        Options: With no FILE, or when FILE is -, read standard
        input.

                -b      read files in binary mode
                -c      check MD5 sums against given list
                -t      read files in text mode (default)
                -g      read a string

        The following two options are useful only when verifying
        checksums:

                -s      don't output anything, status code shows success
                -w      warn about improperly formated MD5 checksum lines

        Example:

                $ md5sum < busybox
                6fd11e98b98a58f64ff3398d7b324003
                $ md5sum busybox
                6fd11e98b98a58f64ff3398d7b324003  busybox
                $ md5sum -c -
                6fd11e98b98a58f64ff3398d7b324003  busybox
                busybox: OK
                ^D

        -------------------------------

    mkdir
        mkdir [OPTION] DIRECTORY...

        Create the DIRECTORY(ies), if they do not already exist

        Options:

                -m      set permission mode (as in chmod), not rwxrwxrwx - umask
                -p      no error if existing, make parent directories as needed

        Example:

                $ mkdir /tmp/foo
                $ mkdir /tmp/foo
                /tmp/foo: File exists
                $ mkdir /tmp/foo/bar/baz
                /tmp/foo/bar/baz: No such file or directory
                $ mkdir -p /tmp/foo/bar/baz

        -------------------------------

    mkfifo
        mkfifo [OPTIONS] name

        Creates a named pipe (identical to 'mknod name p')

        Options:

                -m      create the pipe using the specified mode (default a=rw)

        -------------------------------

    mkfs_minix
        mkfs_minix [-c | -l filename] [-nXX] [-iXX] /dev/name
        [blocks]

        Make a MINIX filesystem.

        Options:

                -c              Check the device for bad blocks
                -n [14|30]      Specify the maximum length of filenames
                -i INODES       Specify the number of inodes for the filesystem
                -l FILENAME     Read the bad blocks list from FILENAME
                -v              Make a Minix version 2 filesystem

        -------------------------------

    mknod
        mknod [OPTIONS] NAME TYPE MAJOR MINOR

        Create a special file (block, character, or pipe).

        Options:

                -m      create the special file using the specified mode (default a=rw)

        TYPEs include:

                b:      Make a block (buffered) device.
                c or u: Make a character (un-buffered) device.
                p:      Make a named pipe. MAJOR and MINOR are ignored for named pipes.

        Example:

                $ mknod /dev/fd0 b 2 0 
                $ mknod -m 644 /tmp/pipe p

        -------------------------------

    mkswap
        mkswap [-c] [-v0|-v1] device [block-count]

        Prepare a disk partition to be used as a swap partition.

        Options:

                -c              Check for read-ability.
                -v0             Make version 0 swap [max 128 Megs].
                -v1             Make version 1 swap [big!] (default for kernels >
                                2.1.117).
                block-count     Number of block to use (default is entire partition).

        -------------------------------

    mktemp
        mktemp [-q] TEMPLATE

        Creates a temporary file with its name based on TEMPLATE.
        TEMPLATE is any name with six `Xs' (i.e. /tmp/temp.XXXXXX).

        Example:

                $ mktemp /tmp/temp.XXXXXX
                /tmp/temp.mWiLjM
                $ ls -la /tmp/temp.mWiLjM
                -rw-------    1 andersen andersen        0 Apr 25 17:10 /tmp/temp.mWiLjM

        -------------------------------

    more
        more [FILE ...]

        More is a filter for viewing FILE one screenful at a time.

        Example:

                $ dmesg | more

        -------------------------------

    mount
        mount [flags] device directory [-o options,more-options]

        Mount a filesystem

        Flags:

                -a:             Mount all filesystems in fstab.
                -f:             "Fake" Add entry to mount table but don't mount it.
                -n:             Don't write a mount table entry.
                -o option:      One of many filesystem options, listed below.
                -r:             Mount the filesystem read-only.
                -t fs-type:     Specify the filesystem type.
                -w:             Mount for reading and writing (default).

        Options for use with the "-o" flag:

                async/sync:     Writes are asynchronous / synchronous.
                atime/noatime:  Enable / disable updates to inode access times.
                dev/nodev:      Allow use of special device files / disallow them.
                exec/noexec:    Allow use of executable files / disallow them.
                loop:           Mounts a file via loop device.
                suid/nosuid:    Allow set-user-id-root programs / disallow them.
                remount:        Re-mount a mounted filesystem, changing its flags.
                ro/rw:          Mount for read-only / read-write.

        There are EVEN MORE flags that are specific to each
        filesystem. You'll have to see the written documentation for
        those.

        Example:

                $ mount
                /dev/hda3 on / type minix (rw)
                proc on /proc type proc (rw)
                devpts on /dev/pts type devpts (rw)
                $ mount /dev/fd0 /mnt -t msdos -o ro
                $ mount /tmp/diskimage /opt -t ext2 -o loop

        -------------------------------

    mt  mt [-f device] opcode value

        Control magnetic tape drive operation

        Available Opcodes:

        bsf bsfm bsr bss datacompression drvbuffer eof eom erase fsf
        fsfm fsr fss load lock mkpart nop offline ras1 ras2 ras3
        reset retension rew rewoffline seek setblk setdensity
        setpart tell unload unlock weof wset

        -------------------------------

    mv  mv SOURCE DEST or: mv SOURCE... DIRECTORY

        Rename SOURCE to DEST, or move SOURCE(s) to DIRECTORY.

        Example:

                $ mv /tmp/foo /bin/bar

        -------------------------------

    nc  nc [IP] [port]

        Netcat opens a pipe to IP:port

        Example:

                $ nc foobar.somedomain.com 25
                220 foobar ESMTP Exim 3.12 #1 Sat, 15 Apr 2000 00:03:02 -0600
                help
                214-Commands supported:
                214-    HELO EHLO MAIL RCPT DATA AUTH
                214     NOOP QUIT RSET HELP
                quit
                221 foobar closing connection

        -------------------------------

    nslookup
        nslookup [HOST]

        Queries the nameserver for the IP address of the given HOST

        Example:

                $ nslookup localhost
                Server:     default
                Address:    default
                
                Name:       debian
                Address:    127.0.0.1

        -------------------------------

    ping
        ping [OPTION]... host

        Send ICMP ECHO_REQUEST packets to network hosts.

        Options:

                -c COUNT        Send only COUNT pings.
                -s SIZE         Send SIZE data bytes in packets (default=56).
                -q              Quiet mode, only displays output at start
                                and when finished.

        Example:

                $ ping localhost
                PING slag (127.0.0.1): 56 data bytes
                64 bytes from 127.0.0.1: icmp_seq=0 ttl=255 time=20.1 ms
                
                --- debian ping statistics ---
                1 packets transmitted, 1 packets received, 0% packet loss
                round-trip min/avg/max = 20.1/20.1/20.1 ms

        -------------------------------

    pivot_root
        pivot_root new_root put_old

        Move the current root file system to put_old and make
        new_root the new root file system.

        -------------------------------

    poweroff
        poweroff

        Halt the system and request that the kernel shut off the
        power.

        -------------------------------

    printf
        printf FORMAT [ARGUMENT...]

        Formats and prints ARGUMENT(s) according to FORMAT, Where
        FORMAT controls the output exactly as in C printf.

        Example:

                $ printf "Val=%d
                " 5
                Val=5

        -------------------------------

    ps  ps

        Report process status

        This version of ps accepts no options.

        Example:

                $ ps
                  PID  Uid      Gid State Command
                    1 root     root     S init
                    2 root     root     S [kflushd]
                    3 root     root     S [kupdate]
                    4 root     root     S [kpiod]
                    5 root     root     S [kswapd]
                  742 andersen andersen S [bash]
                  743 andersen andersen S -bash
                  745 root     root     S [getty]
                 2990 andersen andersen R ps

        -------------------------------

    pwd pwd

        Print the full filename of the current working directory.

        Example:

                $ pwd
                /root

        -------------------------------

    rdate
        rdate [OPTION] HOST

        Get and possibly set the system date and time from a remote
        HOST.

        Options:

                -s      Set the system date and time (default).
                -p      Print the date and time.

        -------------------------------

    readlink
        readlink

        Read a symbolic link.

        -------------------------------

    reboot
        reboot

        Reboot the system.

        -------------------------------

    renice
        renice priority pid [pid ...]

        Changes priority of running processes. Allowed priorities
        range from 20 (the process runs only when nothing else is
        running) to 0 (default priority) to -20 (almost nothing else
        ever gets to run).

        -------------------------------

    reset
        reset

        Resets the screen.

        -------------------------------

    rm  rm [OPTION]... FILE...

        Remove (unlink) the FILE(s). You may use '--' to indicate
        that all following arguments are non-options.

        Options:

                -i              always prompt before removing each destinations
                -f              remove existing destinations, never prompt
                -r or -R        remove the contents of directories recursively

        Example:

                $ rm -rf /tmp/foo

        -------------------------------

    rmdir
        rmdir [OPTION]... DIRECTORY...

        Remove the DIRECTORY(ies), if they are empty.

        Example:

                # rmdir /tmp/foo

        -------------------------------

    rmmod
        rmmod [OPTION]... [MODULE]...

        Unloads the specified kernel modules from the kernel.

        Options:

                -a      Try to remove all unused kernel modules.

        Example:

                $ rmmod tulip

        -------------------------------

    route
        route [{add|del|flush}]

        Edit the kernel's routing tables

        -------------------------------

    rpmunpack
        rpmunpack < package.rpm | gunzip | cpio -idmuv

        Extracts an rpm archive.

        -------------------------------

    sed sed [-Vhnef] pattern [files...]

        Options:

                -n              suppress automatic printing of pattern space
                -e script       add the script to the commands to be executed
                -f scriptfile   add the contents of script-file to the commands to be executed
                -h              display this help message

        If no -e or -f is given, the first non-option argument is
        taken as the sed script to interpret. All remaining
        arguments are names of input files; if no input files are
        specified, then the standard input is read.

        Example:

                $ echo "foo" | sed -e 's/f[a-zA-Z]o/bar/g'
                bar

        -------------------------------

    setkeycodes
        setkeycodes SCANCODE KEYCODE ...

        Set entries into the kernel's scancode-to-keycode map,
        allowing unusual keyboards to generate usable keycodes.

        SCANCODE may be either xx or e0xx (hexadecimal), and KEYCODE
        is given in decimal

        Example:

                $ setkeycodes e030 127

        -------------------------------

    sh  sh [FILE]... or: sh -c command [args]...

        lash: The BusyBox LAme SHell (command interpreter)

        This command does not yet have proper documentation.

        Use lash just as you would use any other shell. It properly
        handles pipes, redirects, job control, can be used as the
        shell for scripts, and has a sufficient set of builtins to
        do what is needed. It does not (yet) support Bourne Shell
        syntax. If you need things like "if-then-else", "while", and
        such use ash or bash. If you just need a very simple and
        extremely small shell, this will do the job.

        -------------------------------

    sleep
        sleep N

        Pause for N seconds.

        Example:

                $ sleep 2
                [2 second delay results]

        -------------------------------

    sort
        sort [-n] [-r] [FILE]...

        Sorts lines of text in the specified files

        Example:

                $ echo -e "e
                f
                b
                d
                c
                a" | sort
                a
                b
                c
                d
                e
                f

        -------------------------------

    stty
        stty [-a|g] [-F device] [SETTING]...

        Without arguments, prints baud rate, line discipline, and
        deviations from stty sane.

        Options:

                -F device       open device instead of stdin
                -a              print all current settings in human-readable form
                -g              print in stty-readable form
                [SETTING]       see documentation

        -------------------------------

    swapoff
        swapoff [OPTION] [device]

        Stop swapping virtual memory pages on the given device.

        Options:

                -a      Stop swapping on all swap devices

        -------------------------------

    swapon
        swapon [OPTION] [device]

        Start swapping virtual memory pages on the given device.

        Options:

                -a      Start swapping on all swap devices

        -------------------------------

    sync
        sync

        Write all buffered filesystem blocks to disk.

        -------------------------------

    syslogd
        syslogd [OPTION]...

        Linux system and kernel logging utility. Note that this
        version of syslogd ignores /etc/syslog.conf.

        Options:

                -m NUM          Interval between MARK lines (default=20min, 0=off)
                -n              Run as a foreground process
                -O FILE         Use an alternate log file (default=/var/log/messages)
                -R HOST[:PORT]  Log to IP or hostname on PORT (default PORT=514/UDP)
                -L              Log locally and via network logging (default is network only)

        Example:

                $ syslogd -R masterlog:514
                $ syslogd -R 192.168.1.1:601

        -------------------------------

    tail
        tail [OPTION]... [FILE]...

        Print last 10 lines of each FILE to standard output. With
        more than one FILE, precede each with a header giving the
        file name. With no FILE, or when FILE is -, read standard
        input.

        Options:

                -c N[kbm]       output the last N bytes
                -n N[kbm]       print last N lines instead of last 10
                -f              output data as the file grows
                -q              never output headers giving file names
                -s SEC          wait SEC seconds between reads with -f
                -v              always output headers giving file names

        If the first character of N (bytes or lines) is a '+',
        output begins with the Nth item from the start of each file,
        otherwise, print the last N items in the file. N bytes may
        be suffixed by k (x1024), b (x512), or m (1024^2).

        Example:

                $ tail -n 1 /etc/resolv.conf
                nameserver 10.0.0.1

        -------------------------------

    tar tar -[cxtvO] [--exclude File] [-X File][-f tarFile] [FILE(s)]
        ...

        Create, extract, or list files from a tar file.

        Main operation mode:

                c               create
                x               extract
                t               list

        File selection:

                f               name of tarfile or "-" for stdin
                O               extract to stdout
                exclude         file to exclude
                X               file with names to exclude

        Informative output:

                v               verbosely list files processed

        Example:

                $ zcat /tmp/tarball.tar.gz | tar -xf -
                $ tar -cf /tmp/tarball.tar /usr/local

        -------------------------------

    tee tee [OPTION]... [FILE]...

        Copy standard input to each FILE, and also to standard
        output.

        Options:

                -a      append to the given FILEs, do not overwrite

        Example:

                $ echo "Hello" | tee /tmp/foo
                $ cat /tmp/foo
                Hello

        -------------------------------

    telnet
        telnet host [port]

        Telnet is used to establish interactive communication with
        another computer over a network using the TELNET protocol.

        -------------------------------

    test
        test EXPRESSION or [ EXPRESSION ]

        Checks file types and compares values returning an exit code
        determined by the value of EXPRESSION.

        Example:

                $ test 1 -eq 2
                $ echo $?
                1
                $ test 1 -eq 1
                $ echo $? 
                0
                $ [ -d /etc ]
                $ echo $?
                0
                $ [ -d /junk ]
                $ echo $?
                1

        -------------------------------

    tftp
        tftp command SOURCE DEST

        Transfers a file from/to a tftp server using "octet" mode.

        Commands:

                get     Get file from server SOURCE and store to local DEST.
                put     Put local file SOURCE to server DEST.

        When nameing a server, use the syntax "server:file".

        -------------------------------

    touch
        touch [-c] file [file ...]

        Update the last-modified date on the given file[s].

        Options:

                -c      Do not create any files

        Example:

                $ ls -l /tmp/foo
                /bin/ls: /tmp/foo: No such file or directory
                $ touch /tmp/foo
                $ ls -l /tmp/foo
                -rw-rw-r--    1 andersen andersen        0 Apr 15 01:11 /tmp/foo

        -------------------------------

    tr  tr [-cds] STRING1 [STRING2]

        Translate, squeeze, and/or delete characters from standard
        input, writing to standard output.

        Options:

                -c      take complement of STRING1
                -d      delete input characters coded STRING1
                -s      squeeze multiple output characters of STRING2 into one character

        Example:

                $ echo "gdkkn vnqkc" | tr [a-y] [b-z]
                hello world

        -------------------------------

    true
        true

        Return an exit code of TRUE (0).

        Example:

                $ true
                $ echo $?
                0

        -------------------------------

    tty tty

        Print the file name of the terminal connected to standard
        input.

        Options:

                -s      print nothing, only return an exit status

        Example:

                $ tty
                /dev/tty2

        -------------------------------

    umount
        umount [flags] filesystem|directory

        Unmount file systems

        Flags:

                -a:     Unmount all file systems in /etc/mtab
                -n:     Don't erase /etc/mtab entries
                -r:     Try to remount devices as read-only if mount is busy
                -f:     Force filesystem umount (i.e. unreachable NFS server)
                -l:     Do not free loop device (if a loop device has been used)

        Example:

                $ umount /dev/hdc1 

        -------------------------------

    uname
        uname [OPTION]...

        Print certain system information. With no OPTION, same as -
        s.

        Options:

                -a      print all information
                -m      the machine (hardware) type
                -n      print the machine's network node hostname
                -r      print the operating system release
                -s      print the operating system name
                -p      print the host processor type
                -v      print the operating system version

        Example:

                $ uname -a
                Linux debian 2.2.15pre13 #5 Tue Mar 14 16:03:50 MST 2000 i686 unknown

        -------------------------------

    uniq
        uniq [OPTION]... [INPUT [OUTPUT]]

        Discard all but one of successive identical lines from INPUT
        (or standard input), writing to OUTPUT (or standard output).

        Options:

                -c      prefix lines by the number of occurrences
                -d      only print duplicate lines
                -u      only print unique lines

        Example:

                $ echo -e "a
                a
                b
                c
                c
                a" | sort | uniq
                a
                b
                c

        -------------------------------

    unix2dos
        unix2dos [option] [file]

        See 'dos2unix --help' for help!

        -------------------------------

    update
        update [options]

        Periodically flushes filesystem buffers.

        Options:

                -S      force use of sync(2) instead of flushing
                -s SECS call sync this often (default 30)
                -f SECS flush some buffers this often (default 5)

        -------------------------------

    uptime
        uptime

        Display the time since the last boot.

        Example:

                $ uptime
                  1:55pm  up  2:30, load average: 0.09, 0.04, 0.00

        -------------------------------

    usleep
        usleep N

        Pause for N microseconds.

        Example:

                $ usleep 1000000
                [pauses for 1 second]

        -------------------------------

    uudecode
        uudecode [FILE]...

        Uudecode a file that is uuencoded.

        Options:

                -o FILE direct output to FILE

        Example:

                $ uudecode -o busybox busybox.uu
                $ ls -l busybox
                -rwxr-xr-x   1 ams      ams        245264 Jun  7 21:35 busybox

        -------------------------------

    uuencode
        uuencode [OPTION] [INFILE] REMOTEFILE

        Uuencode a file.

        Options:

                -m      use base64 encoding as of RFC1521

        Example:

                $ uuencode busybox busybox
                begin 755 busybox
                <encoded file snipped>
                $ uudecode busybox busybox > busybox.uu
                $

        -------------------------------

    vi  vi [OPTION] [FILE]...

        edit FILE.

        Options:

                -R      Read-only- do not write to the file.

        -------------------------------

    watchdog
        watchdog DEV

        Periodically write to watchdog device DEV

        -------------------------------

    wc  wc [OPTION]... [FILE]...

        Print line, word, and byte counts for each FILE, and a total
        line if more than one FILE is specified. With no FILE, read
        standard input.

        Options:

                -c      print the byte counts
                -l      print the newline counts
                -L      print the length of the longest line
                -w      print the word counts

        Example:

                $ wc /etc/passwd
                     31      46    1365 /etc/passwd

        -------------------------------

    wget
        wget [-c] [-O file] url

        wget retrieves files via HTTP or FTP

        Options:

                -c      continue retrieval of aborted transfers
                -q      quiet mode - do not print
                -O      save to filename ('-' for stdout)

        -------------------------------

    which
        which [COMMAND ...]

        Locates a COMMAND.

        Example:

                $ which login
                /bin/login

        -------------------------------

    whoami
        whoami

        Prints the user name associated with the current effective
        user id.

        -------------------------------

    xargs
        xargs [COMMAND] [ARGS...]

        Executes COMMAND on every item given by standard input.

        Example:

                $ ls | xargs gzip
                $ find . -name '*.c' -print | xargs rm

        -------------------------------

    yes yes [OPTION]... [STRING]...

        Repeatedly outputs a line with all specified STRING(s), or
        'y'.

        -------------------------------

    zcat
        zcat FILE

        Uncompress to stdout.

        -------------------------------

LIBC NSS
    GNU Libc uses the Name Service Switch (NSS) to configure the
    behavior of the C library for the local environment, and to
    configure how it reads system data, such as passwords and group
    information. BusyBox has made it Policy that it will never use
    NSS, and will never use and libc calls that make use of NSS.
    This allows you to run an embedded system without the need for
    installing an /etc/nsswitch.conf file and without and
    /lib/libnss_* libraries installed.

    If you are using a system that is using a remote LDAP server for
    authentication via GNU libc NSS, and you want to use BusyBox,
    then you will need to adjust the BusyBox source. Chances are
    though, that if you have enough space to install of that stuff
    on your system, then you probably want the full GNU utilities.

SEE ALSO
    textutils(1), shellutils(1), etc...

MAINTAINER
    Erik Andersen <andersee@debian.org> <andersen@lineo.com>

AUTHORS
    The following people have contributed code to BusyBox whether
    they know it or not.

    Erik Andersen <andersen@lineo.com>, <andersee@debian.org>

        Tons of new stuff, major rewrite of most of the
        core apps, tons of new apps as noted in header files.

    Edward Betts <edward@debian.org>

        expr, hostid, logname, tty, wc, whoami, yes
     
    =for html <br>

    John Beppu <beppu@lineo.com>

        du, head, nslookup, sort, tee, uniq

    Brian Candler <B.Candler@pobox.com>

        tiny-ls(ls)

    Randolph Chung <tausq@debian.org>

        fbset, ping, hostname, and mkfifo

    Dave Cinege <dcinege@psychosis.com>

        more(v2), makedevs, dutmp, modularization, auto links file, 
        various fixes, Linux Router Project maintenance

    Karl M. Hegbloom <karlheg@debian.org>

        cp_mv.c, the test suite, various fixes to utility.c, &c.

    Daniel Jacobowitz <dan@debian.org>

        mktemp.c

    Matt Kraai <kraai@alumni.carnegiemellon.edu>

        documentation, bugfixes

    John Lombardo <john@deltanet.com>

        dirname, tr

    Glenn McGrath <bug1@netconnect.com.au>

        ar.c

    Vladimir Oleynik <dzo@simtreas.ru>

        cmdedit, stty-port, locale, various fixes 
        and irreconcilable critic of everything not perfect.

    Bruce Perens <bruce@pixar.com>

        Original author of BusyBox. His code is still in many apps.

    Chip Rosenthal <chip@unicom.com>, <crosenth@covad.com>

        wget - Contributed by permission of Covad Communications

    Pavel Roskin <proski@gnu.org>

        Lots of bugs fixes and patches.

    Gyepi Sam <gyepi@praxis-sw.com>

        Remote logging feature for syslogd

    Linus Torvalds <torvalds@transmeta.com>

        mkswap, fsck.minix, mkfs.minix

    Mark Whitley <markw@lineo.com>

        sed remix, bug fixes, style-guide, etc.

    Charles P. Wright <cpwright@villagenet.com>

        gzip, mini-netcat(nc)

    Enrique Zanardi <ezanardi@ull.es>

        tarcat (since removed), loadkmap, various fixes, Debian maintenance

