W(1)

NAME
w - Show who is logged on and what they are doing.

SYNOPSIS
w -[hfsud] [user]

DESCRIPTION
w displays information about the users currently on the machine, and their processes. The header shows, in this order, the current time, how long the system has been running, how many users are currently logged on, and the system load averages for the past 1, 5, and 15 minutes.

The following entries are displayed for each user: login name, the tty name, remote hostname, login time, idle time, JCPU, PCPU, and the command line of their current process.

The JCPU time is the time used by all processes and their children, attached to the tty. The PCPU time is the time used by the current process.

COMMAND-LINE OPTIONS

-h  Don't print the header lines.

-f  Don't print the remote hostname (unless you have compiled it so that the default is not to print the remote hostname, in which case using this switch will cause it to be printed).

-s  Use the short format. Don't print the login time, remote hostname, JCPU or PCPU times.

-u  Ignores the username while figuring out the current process and cpu times. To demonstrate this, do a "su" and do a "w" and a "w -u".

-d  Implementation of the undocumented -d switch in earlier versions of the BSD w program. This switch causes the PID of the process listed in the what field to also be printed.

user
    Show information about the specified user only.

BUGS
There is a small bug somewhere which means that a user can be reported to have been idle for longer than they have been logged on (if they log on and don't do anything). This is because that is what the ioctl() tells us.

FILES
/etc/utmp -- information about who is currently logged on /proc -- process information

SEE ALSO
free(1), ps(1), top(1), uptime(1), utmp(5), who(1)

AUTHORS
w was written by Steve "Mr. Bassman" Bryant (bassman@muttley.soc.staffs.ac.uk), with certain routines lifted from the original w by Larry Greenfield (greenfie@gauss.rutgers.edu) and Michael K. Johnson (johnsonm@stolaf.edu).