Calculate Unix file permissions. Toggle checkboxes or enter numeric values.
| Permission | Owner | Group | Others |
|---|---|---|---|
| Read (4) | |||
| Write (2) | |||
| Execute (1) |
Numeric
Symbolic
chmod 755 filename
chmod (change mode) is a Unix/Linux command that changes file permissions. It controls who can read, write, and execute a file. Permissions are represented as a 3-digit number (e.g., 755) or symbolic notation (e.g., rwxr-xr-x).
Each digit represents permissions for owner, group, and others. Read (r) = 4, Write (w) = 2, Execute (x) = 1. Add them together: 7 = rwx (4+2+1), 5 = r-x (4+1), 0 = --- (none).