WHO(1) General Commands Manual WHO(1) NAME who - Print information about users who are currently logged in. SYNOPSIS who [OPTION]... [ FILE | ARG1 ARG2 ] 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) 0.11.0 2026-09-01 WHO(1)