Bash Programming Cheat Sheet
A quick cheat sheet for programmers who want to do shell scripting. This is not intended to teach programming, etc. but it is intended for a someone who knows one programming language to begin learning about bash scripting.
Basics
All bash scripts must tell the o/s what to use as the interpreter. The first line of any script should be:
#!/bin/bash
You must make bash scripts executable.
chmod +x filename