w - Show who is logged on and what they are doing.

    1. postgres@VM-4-16-ubuntu:~$ w
    2.  22:34:24 up 23 days, 12:15,  1 user,  load average: 2.09, 2.10, 2.09
    3. USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT
    4. postgres pts/0    117.81.208.104   19:12    0.00s  0.23s  0.00s w