What is suspicious about the following "ls" listing?
host % ls -sail /var/mail 271873 1 drwxrwxrwt 3 root 512 Feb 21 12:26 ./ 3776 1 drwxrwxr-x 20 root 512 Aug 19 1996 ../ 275649 1 drwxrwxr-x 2 root 512 Sep 11 12:43 :saved/ 272086 0 -rw-rw---- 1 ann 0 Feb 21 12:36 ann 272088 1 lrwxrwxrwx 1 bob 32 Feb 21 10:23 bob -> /etc/passwd 272087 4 -rw-rw---- 1 bob 3515 Feb 21 12:23 cheryl
Department of Computer Science
University of California at Davis
Davis, CA 95616-8562