A walk through the universe of the Bash shell
Please follow this link to get the recordings of the Zoom webinar sessions.
For those of you who want to go a bit further, the definitive resource regarding Bash is the excellent Advanced Bash Scripting Guide (ABS).
The sed "grymoire" manual by Bruce Barnett is one of the best online resources, with a step-by-step learning approach.
Most of us will use the GNU flavour of awk, and there is an excellent manual about it. And anyway, there are no big differences between the original awk, nawk and gawk.