linux

https://upload.wikimedia.org/wikipedia/commons/1/1b/Linux_Distribution_…

w
w -h
w -u
w -s
who
who | cut -d' ' -f1 | sort | uniq
users
whoami
id -un
who am i
who mom likes
last jason

https://www.thegeekstuff.com/2009/03/4-ways-to-identify-who-is-logged-i…

https://www.incibe-cert.es/en/blog/linux-capabilities-en

https://developers.redhat.com/blog/2018/10/22/introduction-to-linux-int…

https://linuxhint.com/configuring-zfs-cache/

wmctrl -m

https://askubuntu.com/questions/72549/how-to-determine-which-window-man…

https://www.linux.com/tutorials/how-backup-files-linux-rsync-command-li…

https://www.howtogeek.com/117435/htg-explains-the-linux-directory-struc…

https://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInt…

http://www.linuxjournal.com/article/8366