matt@lappy:~$ sudo apt-get install linux-image
[sudo] password for matt:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package linux-image is a virtual package provided by:
  linux-image-3.8.0-29-generic 3.8.0-29.42
  linux-image-3.13.0-24-lowlatency 3.13.0-24.46
  linux-image-3.13.0-24-generic 3.13.0-24.46
You should explicitly select one to install.

E: Package 'linux-image' has no installation candidate
matt@lappy:~$