Seeking a HowTo manual for simple video-editing using only the command line

I was looking at this HowTo on how to extract stills and clips for video files using only the GNU-Linux commands line, and it got me inspired:
https://trac.ffmpeg.org/wiki/Seeking

I had given up trying to do even the most simple video-editing tasks on my aging AA1, because all the GUI video-editing apps clearly require much more resources than my system can handle. But if I can sample clips from existing video files with the command line, what other video-editing tasks could I do with it? what if I could use the command line to do all the tasks required to edit together a simple video; remove audio from video tracks, stick clips together into a sequence, add a music or voice-over track (or both), add simple titles, and so on.

Does anyone know of a good HowTo manual explaining how to do simple video editing entirely with the command line? If not, how difficult would it be to put one together?