root@vps-zap373328-2:~# apt-get -f  install apache2
Reading package lists... Done
Building dependency tree
Reading state information... Done
apache2 is already the newest version.
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 mysql-server : Depends: mysql-server-5.5 but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a s                                                                                                                                     olution).
root@vps-zap373328-2:~# apt-get -f apache2
E: Command line option 'f' [from -f] is not known.
root@vps-zap373328-2:~# apt-get -f install  apache2
Reading package lists... Done
Building dependency tree
Reading state information... Done
apache2 is already the newest version.
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 mysql-server : Depends: mysql-server-5.5 but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a s                                                                                                                                     olution).