Preface
The GNU Bourne-Again Shell, or Bash, is the best-known Bourne-style shell in the world, and is installed or available for installation on a huge variety of Unix-like systems. Even professionals who don't do a lot of work with Unix or Linux will need to use the Bash shell occasionally.
Bash is a language of contradictions; while it's the best-known and most widely-deployed shell of its kind, it's perhaps also one of the least-understood tools, with a terse syntax that's relatively unique among modern programming languages and can seem bizarre even to experienced users. Bash is powerful in some ways, and very limited in others. It's clear, elegant, and expressive in some ways, and terse, clumsy, and bewildering in others.
Because it's ...
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