On Saturday 06 October 2007 16:46:33 Carl Hartung wrote:
> Hi All,
>
> I'm still running 10.2 :-) and looking to fill in some 'missing bits' of
> information. I've inserted two questions in the following excerpt from a
> *nix file systems tutorial that I found on the 'net:
>
> The permission flags are read left to right
>
> 1   directory flag, 'd' if a directory, '-' if a normal file,
>     something else occasionally may appear here for special devices.
>
> --> What specific documents, man, info, URL, etc., are available which
>     describe these "something else" optional flags in detail?

open

info:/coreutils/What information is listed

in konqueror and scroll down a bit

>
> 2,3,4         read, write, execute permissions for User
>
> 5,6,7         read, write, execute permissions for Group
>
> 8,9,10        read, write, execute permissions for Other
>
> Flag
> -    in any position means "not set"
> r    file is readable
> w    file is writeable (with directories, means files can be added or
> deleted) x    program or script is executable (directory contents can be
> listed) s    where 'x' would normally go is called the set-UID or
> set-groupID flag
>
> --> What would a 't' in the tenth position mean? Example:
>
> drwxrwxrwt  4 carl users 160 2007-10-06 09:46 hdb-test/

That is the "sticky" bit. Basically, it means that a file in that directory 
may only be deleted by its owner. Normally anyone with write permissions to a 
directory can delete a file in it. The "sticky" bit prevents that

> The relevant fstab line is:
>
> /dev/hdb3   /mnt/hdb-test   reiserfs   noauto,user,acl,user_xattr 1 2

Not really relevant for linux file systems. The permissions aren't mount 
options, they are stored in the file system itself.

Anders
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