Andy Green: >>> ll /bin/su >>> -rwsr-xr-x 1 root root 78837 Jul 25 16:36 /bin/su Jon Jahren: >> ll /bin/su >> -rwxr-xr-x 1 jon root 59740 Jul 25 17:39 /bin/su" Paul Howarth: > Not the same as the one above then (the SUID bit is gone). Try: > # chmod 4755 /bin/su > I'd be wondering how the permissions got mangled though... Alessandro Brezzi: > ... it seem another program: different length and different owner: > why? On three (working fine) machines, here, I see: $ ll /bin/su -rwsr-xr-x 1 root root 59740 Jul 26 01:09 /bin/su While the permissions and onwership changes are worrying, I wonder about the file size differences. I see that "su" is from coreutils, and I have: coreutils-5.2.1-48.1 Is everyone using the same package? -- Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists. If you put tomfoolery into a computer, nothing comes out but tomfoolery. But this tomfoolery, having passed through a very expensive machine, is somehow enobled and no-one dare criticise it. -- Pierre Gallois