The problem with /etc/sudoers is a known problem. See bug #8315.
I reinstalled the whole system and opened a second terminal. In this terminal I controlled the mode of /etc/sudoers. It was changed several times during installation to 440.
It is importend that after all rpm packages are installed and before the installation process will start ldap to change the mode of /etc/sudoers to 640.
chmod 640 /etc/sudoers (in the second terminal)
With this workarround the upgrade process was finished successfully. |