If you're unfamiliar, this isn't particular to any distro necessarily, although yes it is largely. It's just a fantastic resource for documentation on all kinds of packages and system configuration.
FWIW, to others reading this thread, if you run Linux the Arch Linux Wiki is an amazing resource you should check out, regardless of what distribution you run.
Some of the info there is, of course, Arch-specific, but most of it can be applied to any other Linux distribution.
You can look up all the awesome lists here: https://github.com/sindresorhus/awesome