apt-get install --only-upgrade opennebula opennebula-sunstone opennebula-gate opennebula-flow python-pyone
вот тут, когда предлагается замена всех файлов, нужно соглашаться, а потом вручную все из копии файлов прописывать заново?
(в мануале так написано:
In order to update the configuration files with your existing customizations you’ll need to:
Compare the old and new configuration files: diff -ur /etc/one.YYYY-MM-DD /etc/one and diff -ur /var/lib/one/remotes/etc.YYYY-MM-DD /var/lib/one/remotes/etc. You can use graphical diff-tools like meld to compare both directories, which are very useful in this step.
Edit the new files and port all the customizations from the previous version.)