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Shell Standards (Tier 1)
Required Header
#!/usr/bin/env bash
set -euo pipefail
Validation
shellcheck must pass- Quote all variables:
"$var" not $var
Common Issues
| Pattern |
Problem |
Fix |
Unquoted $var |
Word splitting |
"$var" |
cd without check |
Silent failure |
cd dir || exit 1 |
[ ] vs [[ ]] |
Portability |
Use [[ ]] in bash |
| Backticks |
Nesting issues |
Use $(command) |
Best Practices
- Use
local for function variables
- Trap errors:
trap 'cleanup' ERR EXIT
- Check command existence:
command -v foo >/dev/null
- Use
readonly for constants
Cluster Scripts
