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Old 11-27-2005, 05:30 PM   #1
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What`s all that rwsr-xr-x...?

Is few people can give me hand please and tell what that tell me rwsr-xr-x....?.
Old 11-27-2005, 05:43 PM   #2
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file right for user - group - other
r - read
w - write
x - execute
s - suid (takes the rights of user or group when executed)
d - directory
see man chmod
Old 11-27-2005, 06:23 PM   #3
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to make it more complex.. this can also be done by numbers.

7 = all rights
6 = read and write
5 = read and execute
4 = read only
3 = execute and write
2 = write only
1 = execute only
0 = no rights

Standard it is done by 3 numbers (one for the user, one for the group, one for everyone else): e.g. 755 or 644 etc etc..

however if you want to set a suid (also called sticky bit) you need to add an extra number infront of the 3 numbers. That numbers is 1.

e.g. chmod 1755 makes a file suid for the user and give all rights to this user the file is owned by. For the group the file is owned by it makes it read/execute only. and for anything/one else too.

Last edited by teebones; 11-27-2005 at 06:35 PM.
Old 11-27-2005, 06:27 PM   #4
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Agree... look at man chmod.

The string "rwsr-xr-x" is read as three groups of three:
  • The first group, "rws," says that the owner of this file has full access to the file, and that it is a setuid program which will execute with the owner's identity.
  • The second group, "r-x", means that users who belong to this 'group' have read and execute permission, but not write.
  • The third group, also "r-x", means that others (those who are neither the owner nor group-members) also can read and execute, but not write.
For directories, the permissions control whether you can:
  • See a list of the files in the directory (Read).
  • Insert and remove files here (Write).
  • Have access to files here if you know their exact name (Execute).

When people refer to these permissions numerically, they use a digit for each "group of three" from left to right. There are eight possibilities, corresponding to the eight numbers (0-7) that can be produced by three binary bits... so-called octal notation.
   Number    Binary Bits     Permissions
   --------  ----------      ------------
       0         000             ---
       1         001             --x
       2         010             -w-
       3         011             -wx
       7         111             rwx
Which real computer-geeks of course know by heart.

Last edited by sundialsvcs; 11-27-2005 at 06:33 PM.
Old 11-27-2005, 09:29 PM   #5
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Read this all the way through te bottom.



Last edited by mokele; 11-27-2005 at 09:30 PM.


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