Is there any documentation on the command line for the project?
Depends on what you mean. Have you gone to the wiki at the top of this page yet? most answers are there. If you specifically want the ‘command line documentation’ for asterisk, then from a shell :-
If you are talking of the Asterisk CLI interface, start with
core show help
and know that this CLI supports ‘tab completion’ , i.e. just type the tab character for options
Okay, I did not realize it so closely acts like a regular Linux Distro.
Yeah, amazingly coincidental