On my ubuntu vps, I've this error, What does it mean? Why were packages kept back? I was advised not to do dist-upgrade. My question is not how to solve this, but why this happened?
The following packages have been kept back:
mysql-client-5.5 mysql-server-5.5 mysql-server-core-5.5
0 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
It's not an error, you should run apt-get dist-upgrade because in this case, the upgrade of mysql involve adding or removing some others packages.
If you are afraid of doing so, you can also try to run apt-get install mysql-server-5.5 which will trigger the update of this particular package (and i think it will handle the 2 others as dependencies).
