Useful Techniques
As with all systems, whether a language or an application or what have you, there are ways of doing things that bubble up as being useful. They are either standard ways of doing things, where keeping to the standard keeps you out of trouble; or they are Aha! moments, where you discover a simpler or faster way to do something; or they are those Doh! moments, when you finally realize you've been reading the documentation all wrong and now it all makes sense. (Not that the bash and *nix man pages are ever cryptic or confusing and difficult to decipher!)
In this section are some of the useful things I've picked up along the way. Generally speaking, if they are included here it is because I've had to show them to someone at some point.