Chmod Calculator
Convert between chmod numeric and symbolic notation. Toggle permissions interactively and get your chmod command instantly.
| Role | Read (r) | Write (w) | Execute (x) | Octal |
|---|---|---|---|---|
| owner | 7 | |||
| group | 5 | |||
| others | 5 |
rwxr-xr-x
chmod 755 filename
Common Presets
Understanding Chmod
The chmod command in Linux/Unix sets file permissions using either numeric (octal) or symbolic notation.
Each digit in the numeric notation represents a role: Owner, Group, and Others. The value is the sum of: Read (4) + Write (2) + Execute (1).
For example, chmod 755 gives the owner full access (7 = 4+2+1) and group/others read & execute access (5 = 4+1).
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