Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 linux-image-extra-3.19.0-66-generic : Depends: linux-image-3.19.0-66-generic but it is not going to be installed
 linux-image-extra-3.19.0-69-generic : Depends: linux-image-3.19.0-69-generic but it is not going to be installed
 linux-image-extra-3.19.0-73-generic : Depends: linux-image-3.19.0-73-generic but it is not going to be installed
 linux-image-extra-3.19.0-75-generic : Depends: linux-image-3.19.0-75-generic but it is not going to be installed
 linux-image-generic-lts-vivid : Depends: linux-image-3.19.0-75-generic but it is not going to be installed
 python-dev : Depends: libpython-dev (= 2.7.5-5ubuntu3) but it is not going to be installed
              Depends: python2.7-dev (>= 2.7.5-1~) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).