Linux commands: who

The who command displays the users logged in to the system.

Unless you’re using a server multiple people have access to, chances are you will be the only user logged in, multiple times:

Why multiple times? Because each shell opened will count as an access.

You can see the name of the terminal used, and the time/day the session was started.

The -aH flags will tell who to display more information, including the idle time and the process ID of the terminal:

The special who am i command will list the current terminal session details:

The who command works on Linux, macOS, WSL, and anywhere you have a UNIX environment

More cli tutorials:

• The Bash shell
• Introduction to Bash Shell Scripting
• The Fish Shell
• Shell, watch file content as it populates
• How to exit Vim
• UNIX Editors
• The UNIX Filesystem Commands
• Unix Shells Tutorial
• How to set an alias in a macOS or Linux shell
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• The Command Line for Complete Beginners
• Introduction to Linux
• How to find the process that is using a port
• Linux commands: mkdir
• Linux commands: cd
• Linux commands: pwd
• Linux commands: rmdir
• Linux commands: ls
• Linux commands: mv
• Linux commands: cp
• Linux commands: less
• Linux commands: tail
• Linux commands: touch
• Linux commands: cat
• Linux commands: find
• Linux commands: ln
• Linux commands: ps
• Linux commands: echo
• Linux commands: top
• Linux commands: kill
• Linux commands: killall
• Linux commands: alias
• Linux commands: jobs
• Linux commands: bg
• Linux commands: fg
• Linux commands: type
• Linux commands: which
• Linux commands: whoami
• Linux commands: who
• Linux commands: clear
• Linux commands: su
• Linux commands: sudo
• Linux commands: chown
• Linux commands: chmod
• Linux commands: passwd
• Linux commands: open
• Linux commands: wc
• Linux commands: history
• Linux commands: du
• Linux commands: umask
• Linux commands: grep
• Linux commands: man
• Linux commands: uname
• Linux commands: sort
• Linux commands: uniq
• Linux commands: diff
• Linux commands: nohup
• Linux commands: df
• Linux commands: xargs
• Linux commands: gzip
• Linux commands: gunzip
• Linux commands: ping
• Linux commands: traceroute
• Linux commands: tar
• Linux commands: export
• Linux commands: crontab
• Linux commands: dirname
• Linux commands: basename
• Linux commands: printenv
• Linux commands: env
• A short guide to the ed editor
• A short guide to vim
• A short guide to emacs
• A short guide to nano
• Linux, no space left on device
• How to use Netcat