Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
WHO(1)			FreeBSD	General	Commands Manual			WHO(1)

NAME
     who -- display who	is on the system

SYNOPSIS
     who [-HmqsTu] [am I] [file]

DESCRIPTION
     The who utility displays information about	currently logged in users.  By
     default, this includes the	login name, tty	name, date and time of login
     and remote	hostname if not	local.

     The options are as	follows:

     -H	     Write column headings above the output.

     -m	     Show information about the	terminal attached to standard input
	     only.

     -q	     ``Quick mode'': List the names and	number of logged in users in
	     columns.  All other command line options are ignored.

     -s	     Show the name, line and time fields only.	This is	the default.

     -T	     Indicate whether each user	is accepting messages.	One of the
	     following characters is written:

	     +	User is	accepting messages.
	     -	User is	not accepting messages.
	     ?	An error occurred.

     -u	     Show idle time for	each user in hours and minutes as hh:mm, `.'
	     if	the user has been idle less that a minute, and ``old'' if the
	     user has been idle	more than 24 hours.

     am	I    Equivalent	to -m.

     By	default, 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 out-
     put line without any user name.  For more information on the special
     characters, see utmp(5).

ENVIRONMENT
     The COLUMNS, LANG,	LC_ALL and LC_TIME environment variables affect	the
     execution of who as described in environ(7).

FILES
     /var/run/utmp
     /var/log/wtmp
     /var/log/wtmp.[0-6]

DIAGNOSTICS
     The who utility exits 0 on	success, and >0	if an error occurs.

SEE ALSO
     last(1), users(1),	w(1), utmp(5)

STANDARDS
     The who utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY
     A who command appeared in Version 1 AT&T UNIX.

FreeBSD	9.3			  May 8, 2002			   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | ENVIRONMENT | FILES | DIAGNOSTICS | SEE ALSO | STANDARDS | HISTORY

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=who&sektion=1&manpath=FreeBSD+5.0-RELEASE>

home | help