Sign In
Create Account
Follow Us on Twitter
Subscribe on Youtube
I'm working on my server and I can't figure out what permissions are for and how to use them. First I see some people use this:
chmod r+w <filename>
and others
chmod 755 <filename>
Why two different ways and what does each do? How does r+w convert into numbers???
When I do a ls -la I see this:
-rwxrwxrwx <filename>
what does that mean? I could see just a rwx which would be read, write, execute but what are the other two rwx for????
Understanding Chmod
Started by
Guest_C3P0_*
, Jan 24 2007 11:03 AM
2 replies to this topic
Back to top|
|
|
#2
Posted 29 May 2007 - 11:25 AM
Grub
-
- Members
-
- 57 posts
Learning Programmer
r = Read Permission
w = Write Permission
x = Execute Permission
+ = add Permission
- = subtract permission
= = set permission equal
thus chmod r+w <filename> means read add write <filename>
The numbers are calulated by adding the amount together:
Read: 4
Write: 2
Execute: 1
So for everyone to read/write/execute you have chmod 777.
The first "-" means directory or file. Will have a "d" if directory.
The first group of "---" are owner. T
he second group is group.
The third group is other.
w = Write Permission
x = Execute Permission
+ = add Permission
- = subtract permission
= = set permission equal
thus chmod r+w <filename> means read add write <filename>
The numbers are calulated by adding the amount together:
Read: 4
Write: 2
Execute: 1
So for everyone to read/write/execute you have chmod 777.
The first "-" means directory or file. Will have a "d" if directory.
The first group of "---" are owner. T
he second group is group.
The third group is other.
#3
Posted 18 June 2007 - 02:12 PM
Prog
-
- Members
-
- 98 posts
Learning Programmer
chmod is a little hard to understand at first but once you get the grasp of it you can understand it easier.
