davinci@ubuntu-server:/$ sudo apt-get autoremove
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-4.4.0-89-generic : Depends: linux-image-4.4.0-89-generic but it is not installed
 linux-image-extra-4.4.0-91-generic : Depends: linux-image-4.4.0-91-generic but it is not installed
 linux-image-generic : Depends: linux-image-4.4.0-91-generic but it is not installed
                       Recommends: thermald but it is not installed
E: Unmet dependencies. Try using -f.