Can’t
remember how to calculate which CHMOD command you want to use. Below you will
find every possible CHMOD command and the file permissions they will set.
Along with a simple explanation, every possible combination is listed below.
The
permission mode is computed by adding up the following values for the user, the
file group, and for everyone else.
- Read 4 – Allowed to read files
- Write 2 – Allowed to write/modify files
- eXecute1 – Read/write/delete/modify/directory
Example 1:
|
user
|
group
|
world
|
|
r+w
|
r
|
|
|
4+2+0
|
4+0+0
|
0+0+0
|
|
= 640
|
||
Example
2:
|
user
|
group
|
world
|
|
r+w+x
|
w+x
|
x
|
|
4+2+1
|
0+2+1
|
0+0+1
|
|
= 731
|
||
Now some
explanations:
|
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
|
