Copy-ready commandchmod — Basic Usage Help and Syntax
chmod --helpProduction warning
Help and syntax commands are generally read-only. The original command shown for context may change systems or data; review it before execution.
Requirements and permissions
- Requirements
- Linux with the referenced utility installed
- Permissions
- No elevated permissions are normally required to view help; local policy and shell access still apply.
- Last reviewed
- 2026-07-31
Examples
Display the full reference
Requests the command's built-in usage information without performing its normal operation.
chmod --helpOriginal command context
The original chmod — Basic Usage example is included for context. Review all parameters before using it in production.
chmod 640 /etc/app.confCommon errors
Unknown option --help
Try 'man chmod' or 'info chmod' because some Unix utilities use manual pages instead of a --help option.