mysql не удаляется [закрыто]

Я хочу переустановить mysql в Ubuntu 16.04.

mysql-server is already the newest version (5.7.21-0ubuntu0.16.04.1).
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 mysql-server : Depends: mysql-server-5.7 but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

После этого я написал код для удаления mysql, но он не удаляется.

sudo apt-get purge mysql-server mysql-client mysql-common mysql-server-core-* mysql-client-core-*
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Note, selecting 'mysql-server-core-5.1' for glob 'mysql-server-core-*'
Note, selecting 'mysql-server-core-5.5' for glob 'mysql-server-core-*'
Note, selecting 'mysql-server-core-5.6' for glob 'mysql-server-core-*'
Note, selecting 'mysql-server-core-5.7' for glob 'mysql-server-core-*'
Package 'mysql-server-core-5.6' is not installed, so not removed
Package 'mysql-server-core-5.5' is not installed, so not removed
Package 'mysql-server-core-5.1' is not installed, so not removed
Note, selecting 'mysql-client-core-5.5' for glob 'mysql-client-core-*'
Note, selecting 'mysql-client-core-5.6' for glob 'mysql-client-core-*'
Note, selecting 'mysql-client-core-5.7' for glob 'mysql-client-core-*'
Package 'mysql-client-core-5.5' is not installed, so not removed
Package 'mysql-client-core-5.6' is not installed, so not removed
Package 'mysql-client' is not installed, so not removed
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 libmysqlclient20 : Depends: mysql-common (>= 5.5) but it is not going to be installed
 mariadb-common : Depends: mysql-common (>= 5.6.25) but it is not going to be installed
 mysql-client-5.7 : Depends: mysql-client-core-5.7 but it is not going to be installed
                    Depends: mysql-common (>= 5.5) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).