Yeah, I just felt like it. Not gonna make me go bankrupt :)

There’s also the -a option to automatically determine the compressor to use based on the output filename. For example, tar caf myarchive.tar.bz2 ..

Supported by GNU tar and FreeBSD’s tar at least, but not OpenBSD’s tar for one.

There is also dtrx (“do the right extraction”), it work with all kind of formats

Hmm, I’m generally opposed to rote learning of any kind because while it might give you enough to ‘get along’ you’ll never master anything without understanding.

Particularly with computing, understanding (more-or-less) what you’re doing takes a little more effort but yields great rewards.

That’s not to say all cheat sheets are evil, there are some things which must be learned — I just don’t think this one is very good.

Are man pages dead?

Using the shell to extract files should mean it’s faster to rtfm than dig online. With a case as simple as this, learning through man or --help should be so fast there’s no need for a page like this.

Cheat sheets should come with “See also” references anyway.

That is actually the most compelling reason to use yarn, that it produces a sane lock file.