Linux

This is really good. Clear and well laid out.

The only thing that might confuse some beginners is your specific choice of package manager.

Interesting compilation, there is cheat.sh, tldr and others though

Nice work.

My tiny nitpick is that "touch" will create the file you specify if it doesn't exist. I've seen this usage a lot, so your example may benefit from mentioning it.

Thanks for all the feedback! I'm much happier with it now, and I'll probably continue to make small changes over time.

I find the references to file extension kinda confusing. Extensions mean a lot less in Linux cli, but I can tell youre just using them for examples. Maybe give more concrete examples instead.

ls *.sh to list all the files ending in .sh

I don't know how this would be useful to someone reading the cheat sheet, but here's something interesting I just indirectly found out while skimming it through:

Ctrl+D does the same thing as ENTER, except the latter additionally sends the end-of-line character to the reader while the former sends nothing;
as is the case for shells or interactive programs like the Python REPL, Ctrl+D causes them to terminate only because it sends a string that is 0 characters long, and 0-size reads are universally interpreted as files reaching the end.

To test this: enter cat, type "hello" without pressing enter, then Ctrl+D: you should see "hellohello".
An extremely rare case of this being useful would be using netcat to send a string somewhere, without sending the end-of-line byte at the end.

Cool, thank you!

Oh. My. Gosh. I love this. Thank you. And thank you for being --verbose about the provenance and history of the document. And big big thank yous for the Internet Archive links. Bravo.

What do you mean about "/ root directory, eg /usr/bin/bash"? / is /, just the top-most directory

would you upload this on github?

You might consider putting a license on it

I've been using Linux for decades and I bet that'll still come in handy.

cd - changes to the previous directory

This is fantastic. Just at a glance I already learned something new! Definitely keeping this for reference.

Aren't Alt + Backspace, and Alt + Arrow Key Left/Right also terminal shortcuts?

I like your version, I am bookmarking it.

This is really nice!

This is really helpful, thank you.

Really cool!
Another good addition to this might be some script rudiments, like how to write and run simple .sh files

^S - stop terminal IO
^Q - resume terminal IO (if your terminal looks frozen, this is the one to try)
alt-b, alt-f - jump back/forward one word

You're a prince among men.

A little over a decade & a half and I find that very useful. Should have GPG in for reading signatures on software and such too. If you'd like I can contribute to GPG terminal as I've been using it for a good portion of that time.

I owe you bigly

I've needed something like this for a while, thank you buddy

Awesome! Thank you kindly

Great idea. I'll keep this handy from now on.

At the end, in redirection, <<: that's not how here-documents work. The example gives the impression it will read the given file up until "STOP", but in reality the shell expects you to keep writing your here-doc until you write "STOP" and then feeds it to the program as if it were all on stdin. I don't think wc even does anything with the stdin if you give it a filename... Note that variable expansion will happen in here-docs, so it's a bit different than a simple cat. Also look into here-strings. And process substitution, I find that quite handy.