Bash Quick Reference
In this quick reference, you'll find everything you need to know about the bash shell. Whether you print it out or read it on the screen, this PDF gives you the answers to the annoying questions that always come up when you're writing shell scripts: What characters do you need to quote? How do you get variable substitution to do exactly what you want? How do you use arrays? It's also helpful for interactive use.
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bash Quick Contents History
By Arnold Robbins Functions
everything you need to know about the Job Control
do you need to quote? How do you get Resources