I would like to have a list of all users that are active on my Linux system, including those who have running but detached screen sessions. The who
command only shows me currently logged in users, but not users with detached screen sessions and the like.
I was contemplating parsing the output of ps
but that would also make a user show if if he has a cron job running.
Best Answer
Try:
This should tell you all UIDs with processes with a session terminal (like a window in screen). I use the UID to be weed out the 'system' users (like apache) and nobody (high UID), and ignore daemons.