When a non-root user mounting CDs with fstab entry of /dev/cdrom /mnt/cdrom iso9660 noauto,user,ro 0 0 and directory list is lrwxrwxrwx 1 root root 3 Mar 22 07:31 /dev/cdrom -> hdc brw-rw---- 1 root disk 22, 0 May 5 1998 /dev/hdc I get following non-existant UID 105 after cdrom mount [root@random /etc]# ls -lat /mnt total 3 drwxr-xr-x 23 root root 1024 Mar 29 18:28 .. drwxr-xr-x 8 root root 1024 Mar 29 11:09 . dr-xr-xr-x 8 105 users 2048 Jun 14 1998 cdrom Steve Egbert
the userid of the person who burned the CD was 105. When you mount something it changes the uid of the mount point to that of the root of the partition/disk/cd/whatever that you are mounting.