Hot answers tagged upgrade
No process in a server environment need to be stopped/closed during an update with the package manager. The installation and removal scripts in /var/lib/dpkg/info start and stop the services for you, if it's necessary. Mostly it's only a reload, e.g. sudo systemctl reload service_name or a restart sudo systemctl restart service_name A reboot is usually ...
The command sudo apt-get upgrade doesn't install new versions. For a full upgrade you have to run sudo apt-get dist-upgrade This command has nothing to do with an upgrade to the next Ubuntu release.
let's put this as an answer 13.04 and 13.10 expired long ago. Now you either upgrade to 14.04 (which is LTS) or 15.10
I had the same problem after updating Virtualbox from 4.3.10-dfsg-1ubuntu5 to 4.3.34-dfsg-1+deb8u1ubuntu1.14.04.1, concretely the following packages: virtualbox, virtualbox-dkms and virtualbox-qt. I got to start my VM after disabling USB2.0 (EHCI). To solve the problem and use your VM with USB2.0, what I did is to update the Oracle VM Virtualbox ...
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