On a related note, the website cheat.sh is also a great resource. Just curl it with the command you want to learn about as the endpoint.

For example, if I want to learn about grep, just open a terminal and

$ curl cheat.sh/grep

And a short and sweet description with examples will be returned.

Without the spam ad insanity:

https://web.archive.org/web/20230605010854/https://linuxopsys.com/topics/linux-commands-cheat-sheet

On a whole different level... (on enthusiast lvl hardware) a Llama2 70B running with 4 bit GGML on a 16GBV 3080Ti 12th gen Intel with 64GB can do bash and Python completely offline at a cheat sheet/stack overflow level without major errors. I just spent a day modifying someone else's python script and never went online for anything, have never been good at Python, and haven't messed with it for years. I actually got more done than I ever have before in a single day mostly because I didn't need to search documentation. FOSS/almost FOSS/offline AI rocks.

See also:

• tldr — collection of community-maintained help pages for command-line tools
• explainshell — write down a command-line to see the help text that matches each argument
• General purpose command-line tools — examples for most common usecases
• Bash reference cheatsheet — nicely formatted and explained well
• Bash scripting cheatsheet — quick reference to getting started with Bash scripting

If suggestions for other helpful sites is ok, I visit SS64.com frequently for help with commands. I like that it has Linux and windows CMD and powershell help, so I can just remember one place to go to.

https://ss64.com/

I would love to have a poster of this in that old Apple Basic reference poster style