ultrix man page for who

who(1)							      General Commands Manual							    who(1)

Name
       who - print who and where users are logged in

Syntax
       who [who-file] [am i]

Description
       The command, without an argument, lists the login name, terminal name, and login time for each current UNIX user.

       Without	an  argument,  examines  the  /etc/utmp file to obtain its information.  If a file is given, that file is examined.  Typically the
       given file will be /usr/adm/wtmp, which contains a record of all the logins since it was created.  Then lists logins, logouts, and  crashes
       since  the creation of the wtmp file.  Each login is listed with user name, terminal name (with /dev/ suppressed), and date and time.  When
       an argument is given, logouts produce a similar line without a user name.  Reboots produce a line with `~' in the place of the device name,
       and a fossil time indicative of when the system went down.

       With two arguments, as in `who am I' (and also `who are you'), tells who you are logged in as.

Files
       /etc/utmp

See Also
       getuid(2), utmp(5)

																	    who(1)