Problem
During an update you will see the following message:
Warning: UCR templates were not updated. Please check /var/log/univention/updater.log or execute univention-check-templates as root.
Investigation
The template files are provided by Univention to create the Linux configuration files. They should not be modified.
Step 1
To check which template files are affected execute the mentioned script:
root@ucs:~# univention-check-templates
WARNING: The following UCR templates are modified locally.
Updated versions will be named FILENAME.dpkg-*.
The files should be checked for differences.
/etc/univention/templates/files/etc/bash.bashrc
Step 2
Identify the changes.
Within the directory /etc/univention/templates/files/etc/ there will be some files with a similar name. Additionally to bash.bashrc you might see bash.bashrc.dpkg-1.
Step 3
Identify the differences of the files with the diff command:
root@ucs:/etc/univention/templates/files/etc# diff bash.bashrc-dpkg-1 bash.bashrc
63a64
> alias "li"="ls -al"
So the bash.bashrc has an additional line with an alias command.
Solution
Option 1
Replace the modified template with the one provided by Univention:
mv bash.bashrc-dpkg-1 bash.bashrc
Option 2
Decide to keep the manual edits in case you need them and ignore the warning.