Agreed. It's almost always worth investing time in learning your tools, and if you're like me the bash shell is your fundamental, most used tool.

I have to give Peteris Krumins credit for creating some great references like http://www.catonmat.net/blog/the-definitive-guide-to-bash-co... and http://www.catonmat.net/blog/bash-vi-editing-mode-cheat-shee... (or for the depraved, http://www.catonmat.net/blog/bash-emacs-editing-mode-cheat-s...)