The only commandment you need to stay away from shell:
exit.
TIL: bash has builtin macro recording with the usual emacs
inspired shortcuts!
Life starts with a shebang #!
Reversing the output of a stream by piping it to tac is
such a UNIX thing to do.
As I'm doing floating point calculations in BASH I realize
how poor a general purpose language it really is. It's like
something from bc.
This site is a self study in KISS, using recutils and a 37
lines long bash script.