Octal Permissions
| Octal | Permission |
| 0 | |
| 1 | _ _ x = execute |
| 2 | _ w _ = write |
| 3 | _ w x = write,execute |
| 4 | r _ _= read |
| 5 | r _ x = read,execute |
| 6 | r w _ = read,write |
| 7 | r w x = read,write,execute |
Examples
Ensure that your home directory is not writeable by other users.
chmod g-w,o-w ~To assign others segment read permissions only
sudo chmod o=r file1.txtAssign different permissions to file, group and others
chmod u=rwx,g=rw,o=r filename.txtSet file permissions of file1.txt to be the same as those of file2.txt
chmod --reference=file2.txt file1.txtRelated
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Links
- https://en.wikipedia.org/wiki/Chmod