树莓2安装LAMP后，无法安装FTP

gs526724

root@raspberrypi:/var/www# apt-get install vsftpd
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:
mysql-server : Depends: mysql-server-5.5 but it is not going to be installed
vsftpd : Depends: dialog but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).
求助，