This is part of the Semicolon&Sons Code Diary - consisting of lessons learned on the job. You're in the networking category.
Last Updated: 2024-04-26
When debugging a production server (e.g. to figure out what colleague's to
question), you might want to see what computers logged in last (or is currently
logged in). For that, use the last command:
$ last
root pts/0 95.44.244.36 Fri Nov 15 15:16 still logged in
root pts/0 213.61.219.34 Wed Nov 13 14:16 - 15:00 (00:44)
reboot system boot 4.15.0-66-generi Sun Nov 10 01:24 still running
root pts/0 87.180.201.97 Fri Nov 8 10:08 - 10:11 (00:02)
root pts/0 78.55.6.37 Thu Nov 7 09:08 - 09:14 (00:06)
root pts/0 87.180.201.97 Wed Nov 6 16:39 - 16:40 (00:00)