[TriLUG] first post: looking for basic Linux course

[Jeffrey Crews]

Hello all-

I'm Jeff C. I'm a Splatspace member from Durham who's been interested in OS
hardware for a few years, building a couple of 3D printers and a CNC mill.

I've been using Ubuntu for a couple of years but have been dodging the
necessity of becoming familiar with what's under the hood. So, now I'm
looking for a good basic intro to Linux.

A quick look online finds a huge amount of material: free courses, paid
courses, dead tree versions, etc etc. I need to winnow that down. Justis P.
suggested that I sign up and ask here.

 I'd appreciate any recommendations for a basic, progressive Linux course
to get comfortable with using the command line and so I have a better
chance of understanding some of the error messages.

I don't necessarily need a cert, but material analogous to a basic cert
would probably be about what I need to start. TIA for any suggestions.

JSC