w - Show who is logged on and what they are doing.
Found in linux and other *nix operating systems. Useful in shared servers to see users logged in and what processes they're executing. Sample output below:
09:04:53 up 102 days, 17:01, 7 users, load average: 0.33, 0.27, 0.27
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
diego pts/0 tmux(64245).%28 11Aug22 17:52m 49:13 0.28s -bash