who - who
NAME SYNOPSIS DESCRIPTION Arguments: OPTIONSNAME
who − who
SYNOPSIS
who [OPTION]... [ FILE | ARG1 ARG2 ]
DESCRIPTION
Print information about users who are currently logged in.Note: When built with musl libc, the ‘who‘ utility will not display any information about logged−in users. This is due to musl’s stub implementation of ‘utmpx‘ functions, which prevents access to the necessary data.
Arguments:
[FILE]...
OPTIONS
−a, −−all
same as −b −d −−login −p −r −t −T −u
−b, −−boot
time of last system boot
−d, −−dead
print dead processes
−H, −−heading
print line of column headings
−l, −−login
print system login processes
−−lookup
attempt to canonicalize hostnames via DNS
|
−m |
only hostname and user associated with stdin |
−p, −−process
print active processes spawned by init
−q, −−count
all login names and number of users logged on
−r, −−runlevel
print current runlevel
−s, −−short
print only name, line, and time (default)
−t, −−time
print last system clock change
−u, −−users
list users logged in
−T, −−mesg
add user’s message status as +, − or ? [aliases: −w, −−message, −−writable]
−h, −−help
Print help
−V, −−version
Print version
If FILE is not specified, use /var/run/utmp. /var/log/wtmp as FILE is common. If ARG1 ARG2 given, −m presumed: ’am i’ or ’mom likes’ are usual.