Chmod Calculator
Calculate Linux file permissions (chmod) visually. Convert between permissions checkboxes, octal notation, and symbolic notation.
Permission Grid
| Role | Read (4) | Write (2) | Execute (1) |
|---|---|---|---|
| Owner | |||
| Group | |||
| Public |
Common Presets
Results
Chmod Calculator
The Chmod Calculator is a visual tool to help you understand and generate Linux file permissions. In Linux/Unix systems, file permissions determine who can read, write, or execute a file.
Understanding Roles
- Owner: The user who owns the file. Usually the creator.
- Group: A defined group of users who share permissions.
- Public (Others): Everyone else on the system.
Understanding Permissions
- Read (4): Permission to view the file content.
- Write (2): Permission to modify or delete the file.
- Execute (1): Permission to run the file as a program or script.
Common Values
- 755 (rwxr-xr-x): Standard for directories and executable scripts. Owner has full access; others can only read and execute.
- 644 (rw-r--r--): Standard for regular files (like HTML, images). Owner can read/write; others can only read.
- 777 (rwxrwxrwx): Full access for everyone. Use with extreme caution as it is a security risk.
- 400 (r--------): Read-only for the owner, no access for anyone else. Used for sensitive keys.