Chmod Calculator
An awesome Chmod Calculator to convert Linux file permissions between different formats.
Common Presets:
Chmod Calculator
Chmod Calculator is a free utility to calculate the numeric (octal) or symbolic value for a set of file or folder permissions in Linux servers.
How to use
Check the desired boxes or directly enter a valid numeric value (e.g. 777) or symbolic notation (e.g. rwxrwxrwx) to see its value in other formats.
File Permissions
File permissions in Linux file system are managed in three distinct user classes: user/owner, group and others/public. Each class can have read, write and execute permissions. File permission can be represented in a symbolic or numeric (octal) format.
Table des Combinaisons Octales (0 à 7)
| Octal | Binaire / Somme | Symbolique | Description de la permission |
|---|---|---|---|
| 0 | 0 + 0 + 0 | --- |
Aucune permission (No permissions) |
| 1 | 0 + 0 + 1 | --x |
Exécution seule (Execute only) |
| 2 | 0 + 2 + 0 | -w- |
Écriture seule (Write only) |
| 3 | 0 + 2 + 1 | -wx |
Écriture et exécution (Write & Execute) |
| 4 | 4 + 0 + 0 | r-- |
Lecture seule (Read only) |
| 5 | 4 + 0 + 1 | r-x |
Lecture et exécution (Read & Execute) |
| 6 | 4 + 2 + 0 | rw- |
Lecture et écriture (Read & Write) |
| 7 | 4 + 2 + 1 | rwx |
Accès total : Lecture, écriture et exécution (Read, Write & Execute) |