WHO(1)

NAME
who - who is logged in on the system

SYNOPSIS
who [ who-file ] [ am i ]

DESCRIPTION
Used without arguments, who lists the login name, terminal name, and login time for each current user. who gets this information from the /etc/utmp file.

If a filename argument is given, the named file is examined instead of /etc/utmp. Typically the named file is /var/adm/wtmp, which contains a record of all logins since it was created. In this case, who lists logins, logouts, and crashes. Each login is listed with user name, terminal name (with /dev/ suppressed), and date and time. Logouts produce a similar line without a user name. Reboots produce a line with `~' in place of the device name, and a fossil time indicating when the system went down. Finally, the adjacent pair of entries `|' and `}' indicate the system-maintained time just before and after a date command changed the system's idea of the time.

With two arguments, as in `who am i' (and also `who is who'), who tells who you are logged in as: it displays your hostname, login name, terminal name, and login time.

EXAMPLES

    example% who am i
    example!ralph	ttyp0	Apr 27 11:24
    example%

    example% who
    mktg	  ttym0	Apr 27 11:11
    gwen	  ttyp0	Apr 27 11:25
    ralph	  ttyp1	Apr 27 11:30
    example%

FILES
/etc/utmp
/var/adm/wtmp

SEE ALSO
login(1), w(1), whoami(1), utmp(5V), locale(5)