I have some additional information to further clarify the mount/umount issue: >From a straight boot up, mount/umount works normally. Thanks go bad whenever I run redhat-config-packages and attempt to install additional packages from the distribution disks. redhat-config-packages refuses to mount the distribution disk it is calling for. The only choice I have is to abort the package install. There is an entry in /var/log/messages: Sep 28 09:08:28 steverod userhelper: pam_timestamp: timestamp file `/var/run/sudo/srodgers/unknown:root' is too old, disallowing access to redhat-config-packages for UID 500 After this event, I have trouble with the command line mount/umount commands as I mentioned in my previous message.