[Suggestion] Addition to basics section and a new 'process management' section

[joerodrig]

Might be cool to add an example for man <command> in basics so people could feel free to 'explore' other commands which may not be documented here.

I feel like a process management section might be helpful as well:
ie.

top
ps aux | grep <process name>
kill <pid>

Coming from Rails, the process management commands were very helpful to remember before Rails had a restart command.