who
v(uutils coreutils) 0.1.0
Options
--all,-a- 
who-help-all
 --boot,-b- 
who-help-boot
 --dead,-d- 
who-help-dead
 --heading,-H- 
who-help-heading
 --login,-l- 
who-help-login
 --lookup- 
who-help-lookup
 -m- 
who-help-only-hostname-user
 --process,-p- 
who-help-process
 --count,-q- 
who-help-count
 --runlevel,-r- 
who-help-runlevel
 --short,-s- 
who-help-short
 --time,-t- 
who-help-time
 --users,-u- 
who-help-users
 --mesg,--message,--writable,-T,-w- 
who-help-mesg
 
Examples
Display the username, line, and time of all currently logged-in sessions:
who
Display all available information:
who {{[-a|--all]}}
Display all available information with table headers:
who {{[-aH|--all --heading]}}
The examples are provided by the tldr-pages project under the CC BY 4.0 License.
Please note that, as uutils is a work in progress, some examples might fail.