chmod Calculator
Build Unix file permissions visually — get octal notation and chmod command instantly.
Permissions
| Read (r) | Write (w) | Execute (x) | Octal | |
|---|---|---|---|---|
| Owner | 0 | |||
| Group | 0 | |||
| Other | 0 |
Result
Octal
000
Symbolic
---------
Command
chmod 000 filename
Enter Octal Value
Enter digits 0–7 (e.g. 755, 644, 600)
Common Presets
Common Permissions Reference
| Octal | Symbolic | Use case | Notes |
|---|---|---|---|
| 644 | rw-r--r-- | Web files, config files | Web |
| 755 | rwxr-xr-x | Directories, executables | Exec |
| 600 | rw------- | SSH keys, private data | Private |
| 700 | rwx------ | Private scripts | Private |
| 400 | r-------- | Read-only files, certs | Read-only |
| 750 | rwxr-x--- | Group-accessible scripts | Exec |
| 664 | rw-rw-r-- | Shared group files | Shared |
| 777 | rwxrwxrwx | Fully open (avoid on prod) | Caution |