Linux Bash

Introductory page on writing Bash scripts: scripts need Unix newlines, a first-line shebang and execute permission (chmod +x), followed by how bash parses commands, variables, loops, arithmetic and functions.

Community-maintained list of habits for writing reliable Bash scripts: choose the right shebang, quote variables, prefer [[ ]] over [, use $(...) and arrays, avoid parsing ls, and debug with set -x. It points readers on to the BashFAQ and BashPitfalls pages.