On computer filesystems, different files and directories have
permissions that specify who and what can read, write, modify and access them.
Permission Modes
The permission mode is computed by adding up the following values for
the user, the file group, and for everyone else. The diagram shows
how.
- Read 4 - Allowed to read files
- Write 2 - Allowed to write/modify files
- eXecute1 - Read/write/delete/modify/directory
Example Permission Modes
| Mode | Str Perms | Explanation
|
| 0477 | -r--rwxrwx | owner has read only (4), other and group has rwx (7)
|
| 0677 | -rw-rwxrwx | owner has rw only(6), other and group has rwx (7)
|
| 0444 | -r--r--r-- | all have read only (4)
|
| 0666 | -rw-rw-rw- | all have rw only (6)
|
| 0400 | -r-------- | owner has read only(4), group and others have no permission(0)
|
| 0600 | -rw------- | owner has rw only, group and others have no permission
|
| 0470 | -r--rwx--- | owner has read only, group has rwx, others have no permission
|
| 0407 | -r-----rwx | owner has read only, other has rwx, group has no permission
|
| 0670 | -rw-rwx--- | owner has rw only, group has rwx, others have no permission
|
| 0607 | -rw----rwx | owner has rw only, group has no permission and others have rwx
|
