I was attempting to install Windows 7 in Virtual Box with Ubuntu 14.04 as the host OS.
While so doing, a kernel error message came up.
Suddenly, the terminal and software center were gone. I managed to recover them, but then the Ubuntu Software Center asked for a reboot so that the changes made to update an application could take effect.
After rebooting, my GUI was completely gone.
Now, whenever I boot Ubuntu I just get dumped at a command prompt. After loging into the CMD, it shows this message:
/etc/update-motd.d/91-release-upgrade: 4: /etc/update-motd.d/91-release-upgrade: lsb_release: not found
FYI, I have an AMD graphics card.
What happened, and how can I repair my system?