Linux In The Shell aims to explore the use of many commands a user can run in the Bash Shell. Tutorials include a write up with examples, an audio component about the write up, and a video component to demonstrate the usage of the command.
The website is https://www.linuxintheshell.com/
Episode 31 of Linux in the Shell discuses the use of the who command. The who command does more than just identify who is logged into a system. Who is coupled with init and will produce statistical information about the system since the last boot. Make sure you visit the entry on https://www.linuxintheshell.com/2013/06/04/episode-031-who/ to get the full write up of the who command and for further information in the bibliography on topics discussed.
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