Uninstalling the Sentinel server does not remove the Sentinel Administrator User from the operating system. You must manually remove that user.
After you uninstall Sentinel, certain systems settings remain. You must remove the settings before performing a fresh installation of Sentinel, particularly if there were errors while uninstalling Sentinel.
To manually clean up the Sentinel system settings:
Log in as root.
Ensure that all Sentinel processes are stopped.
Remove the contents of /opt/novell/sentinel or wherever the Sentinel software was installed.
Make sure no one is logged in as the Sentinel Administrator operating system user (novell by default), then remove the user, the home directory, and the group.
userdel -r novell
groupdel novell
Restart the operating system.