This is host, a simple DNS query program.  The man page explains usage
and stuff.  It contains a patch by joern@imf.unit.no, here's his comments:

> The following fix to the "host" program serves to increase robustness, eg.
> core dumping on insufficient arguments is in some cases avoided.  Default
> host is the local host, default query type and class is "any". This is all
> undocumented so far -- both the manual page and the "usage" string needs to
> be updated.

The source can be found at many FTP sites; I fetched it from
ugle.unit.no, file /pub/unix/network/host.tar.Z.

here are some example usages:

Just the address of kuruk.nvg.unit.no:

>host kuruk.nvg.unit.no
kuruk.nvg.unit.no has address 129.241.163.238

Any info on remus.rutgers.edu:

>host -t any remus.rutgers.edu
remus.rutgers.edu has address 128.6.13.3
remus.rutgers.edu HINFO Sun-4/380 Unix
remus.rutgers.edu mail is handled by remus.Rutgers.EDU

What machine has IP number 129.241.1.97:

>host 129.241.1.97
Name: ugle.unit.no
Address: 129.241.1.97
Aliases:

Any info on machines in Albania:

>host -t any -l al.
al SOA  gwd2i.cnuce.cnr.it gennai.cnuce.cnr.it(
                        92030401        ;serial (version)
                        10800   ;refresh period
                        900     ;retry refresh this often
                        604800  ;expiration period
                        86400   ;minimum TTL
                        )
al NS icnucevx.cnuce.cnr.it
icnucevx.cnuce.cnr.it has address 131.114.2.130
icnucevx.cnuce.cnr.it has address 131.114.1.30
icnucevx.cnuce.cnr.it has address 131.114.1.30
al NS gwd2i.cnuce.cnr.it
gwd2i.cnuce.cnr.it has address 131.114.1.31
gwd2i.cnuce.cnr.it has address 131.114.1.31
uniti.al mail is handled by icnucevx.cnuce.cnr.it
dinf.uniti.al mail is handled by icnucevx.cnuce.cnr.it
al SOA  gwd2i.cnuce.cnr.it gennai.cnuce.cnr.it(
                        92030401        ;serial (version)
                        10800   ;refresh period
                        900     ;retry refresh this often
                        604800  ;expiration period
                        86400   ;minimum TTL
                        )

--
Arnt Gulbrandsen
agulbra@nvg.unit.no
