Subj : Re: chmod 2711 not excutable under linux
To   : comp.unix.solaris,comp.os.linux
From : 19owls
Date : Wed Dec 22 2004 12:58 pm

----  19 Owls  ----
> man 2 chmod
> 
> Notice the permission is shown as '-rwx--s--x'   and not '-rwx--x--x'
> 
> The fourth digit when used in referring to file permissions refers to
> 'set group ID' (also 'set user ID' and 'set sticky bit').  A 'SUID'
> binary runs as the user who owns the binary, rather than the person
> who typed the command.  Likewise, a 'SGID' binary runs as the group
> owner, rather than the groups of the user.   You can also set the
> 'SGID' bit on directories, and that means that files created in that
> directory will be owned by the group owner of the directory, rather
> than the primary group of the person creating the file.
> 
> The 'sticky bit' had historic meaning that the file need not be saved
> when being swapped out of memory (instead, you reloaded from normal
> storage).  Today, this bit is normally used on directories, where it
> means that only the owner of the file can delete it. You normally see
> this on a tmp directory (where everyone may be able to write files).
> 
> The 'ls -l' command shows the permissions thusly:
> 
>   chmod         ls -l
> 
>   4700          -rws------
>   4600          -rwS------
>   2750          -rwxr-s---
>   2740          -rwxr-S---
>   1777          drwxrwsrwt     <-- typical permission on /tmp/
>   1776          drwxrwxrwT     <-- rarely used permission on a directory
> 
>         Old guy


Thanks!
I have a rough idea what its applicable to. will read more on it.
i've seen those on the k3bsetup which i had problems with before

.