The UNIX `who` command

While working on a completely different project, I started to ask myself how the who command was working under the hood. In the end, I thought it was a good topic for a blog post. Who is who Let’s start with the basics. the who command allows you to list the users currently logged on the system. For example, on my machine: $ who gauthier tty2 2020-08-30 15:06 (tty2) gauthier pts/1 2020-08-30 15:06 (tmux(1555)....

<span title='2020-08-31 11:40:00 +0000 UTC'>August 31, 2020</span>&nbsp;·&nbsp;1022 words&nbsp;·&nbsp;Gauthier Jolly