Useful documents

Bash

• The Linux Documentation Project (TLDP)
  • Advanced Bash-Scripting Guide
• Greg's wiki
  • BashGuide
  • BashFAQ
  • BashPitfalls

Avoid Bashism

• Greg's wiki's Bashism
• Grymoire's POSIX Shell Tutorial
• 24 Bashism To Avoid for POSIX-Compliant Shell Scripts
• Writing Bash Scripts that are not only Bash: Checking for Bashisms and testing with Dash