Permission Matrix
Click bits to toggle · Owner · Group · Others
| Entity | Read (r) | Write (w) | Execute (x) |
|---|---|---|---|
|
Owner
|
|||
|
Group
|
|||
|
Others
|
644
-rw-r--r--
644
Octal
420
Numeric
rw-r--r--
Symbolic
chmod command
$ chmod 644 filename
Or type an octal value directly
Valid digits: 0–7 for each position
Common Presets
Bit Reference
What each value means
4
Read (r)
View file contents or list directory
2
Write (w)
Modify file or create/delete in directory
1
Execute (x)
Run file as program or enter directory
Symbolic Notation Format
- rw-r--r--
file type · owner · group · others
File type: - = file · d = directory · l = symlink