chris@tealady:~$ sudo 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:
 mariadb-client-5.5 : Breaks: mariadb-server-5.5 (< 5.5.41-1ubuntu0.14.04.1) but                                                                                         5.5.40-0ubuntu0.14.04.1 is installed
 php5-mysql : Depends: php5-common (= 5.5.9+dfsg-1ubuntu4.6) but 5.5.9+dfsg-1ubu                                                                                        ntu4.5 is installed
E: Unmet dependencies. Try using -f.