root@localhost:/etc/apt# apt-get upgrade
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:
 console-setup-linux : Depends: keyboard-configuration (= 1.133) but 1.123 is installed
 perl : Depends: perl-base (= 5.20.2-3+deb8u1) but 5.20.2-6 is installed
E: Unmet dependencies. Try using -f.