Manual: who
WHO(1) General Commands Manual WHO(1)
NAME
who - Print information about users who are currently logged in.
SYNOPSIS
who [-a|--all] [-b|--boot] [-d|--dead] [-H|--heading] [-l|--login] [--lookup] [-m ] [-p|--process] [-q|--count]
[-r|--runlevel] [-s|--short] [-t|--time] [-u|--users] [-T|--mesg] [-h|--help] [-V|--version] [FILE]
DESCRIPTION
Print information about users who are currently logged in.
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 ?
-h, --help
Print help
-V, --version
Print version
[FILE]
VERSION
v(uutils coreutils) 0.8.0
2026-04-16 WHO(1)