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Can any one explain me abt the significance of the symbol "+" next to permissions in the below file
#ls -ltr temp1
-rw-r--r--+ 1 sharif staff 4081304 Jan 17 10:57 temp1
its there only for few files.. if u see the below case its not there
-rwxrwxr-x 1 sharif staff 30406012 Jun 30 2006 temp2
Any specific reasons???
Cheers,
Sharif.S
I am also interested to find this out.. any unix gurus out there ..
Hi Sharif,
[B]The + signifies that there is an ACL set for the file. [/B]
[B]ACLs or Access Control Lists [/B]which are used in Solaris and Linux, gives a user the ability to grant file permissions on a user-by-user basis.
For example, you can create a file that is readable for some users & writable for some other users.
Now, u may think that the same thing can be done rwx permissions, but ACLs provide a much higher degree of control over permissions than standard unix groups.
They are completely under the control of the owner of the file and u don't need the system administrator to create and maintain groups for you.
The two main commands you will use to manipulate ACLs are [B]setfacl [/B]and [B]getfacl[/B].
For example, if I have a file named testing.c, I can set the ACL to allow the owner alone to read & write the file,
whereas the group & others has no access to the file, not even read permission,
[B]setfacl -s user::rw-,group::---,other:--- testing.c [/B]
In the above setfacl commands, the owner gets read/write permissions (rw-) while the group and others get no permissions (---).
The user can then grant read-only access to user devoracl with:
[B]setfacl -m user:devoracl:rw- testing.c [/B]
Similarly, permissions can be set to some other user also.
After setting the ACL on the file, note that ls shows a + after the normal permission list:
[B]ls -l testing.c
-rw-rw----+ 1 robin staff 0 Jan 3 10:07 testing.c[/B]
To display the ACL for the file, getfacl command is used,
[B]getfacl testing.c[/B]
[B]user::rw-
user:devoracl:rw-
group::rw-
other:---[/B]
Hopefully the explanation & examples have cleared ur queries.
*** Innila ***