Treat Bash scripts like any code handling sensitive operations: never embed secrets, validate and sanitize inputs, and avoid invoking user-provided data without careful quoting. Use secure file permissions (chmod) for scripts and temporary files, prefer mktemp to create safe temporary files/directories, and reduce privileges by avoiding sudo inside scripts when possible. Escape or whitelist inputs used in command arguments, and be mindful of environment variables that could be tampered with. Logging should avoid leaking sensitive data. For deployment, integrate scripts into CI with controlled secrets management (vaults or provider-managed secrets). Community practice: share security checklists and encourage peer audits—collective scrutiny finds issues faster.