bash-defensive-patterns

Master defensive Bash scripting for production scripts with error resilience and safety.

• Defensive programming for Bash scripts
• Error handling and safety best practices
• Robust error trapping and cleanup
• Safe variable and array handling

• Use strict mode: set -Eeuo pipefail
• Quoting variables to prevent splitting/globbing
• Trap ERR and EXIT for error and cleanup
• Validate inputs and required variables
• Use [[ ]] for Bash, [ ] for POSIX compatibility
• Structured logging with timestamps
• Safe temporary file and directory management
• Comprehensive argument parsing

1. 1.Start with strict mode: set -Eeuo pipefail
2. 2.Quote all variables and use arrays safely
3. 3.Implement error traps for cleanup and logging
4. 4.Validate inputs and use defaults with error messages
5. 5.Use structured logging for monitoring and debugging