WHO(1) | General Commands Manual | WHO(1) |
who
— display who
is logged in
who |
[-HmqTu ] [file] |
who |
am i |
The who
utility displays a list of all
users currently logged on, showing for each user the login name, tty name,
the date and time of login, and hostname if not local.
The options are as follows:
-H
-m
who
am i
.-q
-T
-u
am
i
who
gathers information from the file
/var/run/utmp. An alternate
file may be specified which is usually
/var/log/wtmp (or
/var/log/wtmp.[0-6] depending on site policy as
wtmp can grow quite large and daily versions may
or may not be kept around after compression by
ac(8)). The
wtmp file contains a record of every login,
logout, crash, shutdown and date change since wtmp
was last truncated or created.If /var/log/wtmp is being used as the
file, the user name may be empty or one of the special characters
‘|
’,
‘}
’, and
‘~
’. Logouts produce an output line
without any user name. For more information on the special characters, see
utmp(5).
The who
utility exits 0 on success,
and >0 if an error occurs.
The who
utility is compliant with the
IEEE Std 1003.1-2008 (“POSIX.1”)
specification.
The flags [-abdHlpqrst
] are marked by
IEEE Std 1003.1-2008 (“POSIX.1”) as
being an X/Open System Interfaces option. Of these,
[-abdlprst
] are not supported by this implementation
of who
.
A who
utility appeared in
Version 1 AT&T UNIX.
June 19, 2017 | OpenBSD-6.4 |