The TTY demystified
Some history and details about terminals, their history and their working. Likely very useful for people who haven't encountered actual terminal hardware.
.plan
Online plan/finger site, which actually supports finger. Actually really rather neat.
Build your own NeXT with a virtual machine
Instructions on getting a NeXT machine up and running in a VM.
Colorize your CLI
Blog post that documents some different ways, and some useful tools, for giving more colour to the CLI.
tildeverse
It looks like free shell accounts are still a thing, and there's a movement to encourage their use. Which is kinda cool.
Advanced Bash-Scripting Guide
And advanced guide to bash scripting.
What The @#$%&! (Heck) is this #! (Hash-Bang) Thingy In My Bash Script | Linux Journal
Handy article to help explain shebang to people.
fish: Documentation
Manual for the fish shell. I'm very tempted to give this a try out with a view to changing from zsh.