Update UCS c't edition to UCS 4.0

ucs-3
ct-edition

#1

Problem:

An UCS c’t edition with UCS version 3.2-4 cannot update to UCS 4.0 because:
“The update to UCS 4.0 is blocked because the component ‘ucs-ct-edition’ is marked as required.”

Solution:

UCS updates require current versions of all installed apps/components - for the component ucs-ct-edition no newer component is available, because all contents were integrated in UCS itself.

Therefore you can simply deactivate the old component and remove the old meta package - all these steps can either be achieved at shell or UMC. This article documents the shell way.

1. Deactivate the component
ucr set repository/online/component/ucs-ct-edition=no

2. Remove the old meta package
apt-get purge ucs-ct-edition

3. Upgrade to UCS 4.0
univention-upgrade