All good cheat sheets I’ve found that can be printed out on a single page (… or maybe 2)
markdown: https://packetlife.net/media/library/16/Markdown.pdf
readline: https://readline.kablamo.org/emacs.html
tmux: http://atkinsam.com/documents/tmux.pdf
vim: https://rumorscity.com/wp-content/uploads/2014/08/10-Best-VIM-Cheat-Sheet-05.jpg
vscode: https://code.visualstudio.com/shortcuts/keyboard-shortcuts-linux.pdf
ip command (2 pages): https://access.redhat.com/sites/default/files/attachments/rh_ip_command_cheatsheet_1214_jcs_print.pdf