DentArthurDent wrote:
I a... a fairly basic knowledge of terminal. ...
An interesting way to put it.
The default shell under Ubuntu (as with most other distros) is "bash" (the "Bourne Again SHell").
Quite a good place to start is therefore just "info bash". You can immerse yourself in the wonders of nitty-gritty, text-only help. ("man bash" is OK, but far less "chatty")
Actually, to get familiar with "info", you'll probably need to start from "info", rather than going straight to "info bash". I always forget how to "go back" (type 'l', though once in "info", '?' will help.).
On the other hand,
http://tldp.org/ "The Linux Documentation Project"
may suit you better.
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"Striking up conversations with strangers is an autistic person's version of extreme sports."
Kamran Nazeer