ubuntu@ip-172-31-45-140:~$ sudo apt purge --remove mariadb*
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'mariadb-test' for glob 'mariadb*'
Note, selecting 'mariadb-test-data-10.0' for glob 'mariadb*'
Note, selecting 'mariadb-test-data' for glob 'mariadb*'
Note, selecting 'mariadb-test-5.5' for glob 'mariadb*'
Note, selecting 'mariadb-common' for glob 'mariadb*'
Note, selecting 'mariadb-plugin-connect' for glob 'mariadb*'
Note, selecting 'mariadb-server-core-5.5' for glob 'mariadb*'
Note, selecting 'mariadb-server-5.5' for glob 'mariadb*'
Note, selecting 'mariadb-tokudb-engine-5.5' for glob 'mariadb*'
Note, selecting 'mariadb-server-core-10.0' for glob 'mariadb*'
Note, selecting 'mariadb-connect-engine-10.0' for glob 'mariadb*'
Note, selecting 'mariadb-galera-server' for glob 'mariadb*'
Note, selecting 'mariadb-client-5.5' for glob 'mariadb*'
Note, selecting 'mariadb-server-10.0' for glob 'mariadb*'
Note, selecting 'mariadb-plugin-oqgraph' for glob 'mariadb*'
Note, selecting 'mariadb-plugin-spider' for glob 'mariadb*'
Note, selecting 'mariadb-galera-server-10.0' for glob 'mariadb*'
Note, selecting 'mariadb-plugin-tokudb' for glob 'mariadb*'
Note, selecting 'mariadb-client-10.0' for glob 'mariadb*'
Note, selecting 'mariadb-server' for glob 'mariadb*'
Note, selecting 'mariadb-tokudb-engine-10.0' for glob 'mariadb*'
Note, selecting 'mariadb-client-core-10.0' for glob 'mariadb*'
Note, selecting 'mariadb-client' for glob 'mariadb*'
Note, selecting 'mariadb-test-10.0' for glob 'mariadb*'
Note, selecting 'mariadb-oqgraph-engine-10.0' for glob 'mariadb*'
Note, selecting 'mariadb-galera-server-5.5' for glob 'mariadb*'
Note, selecting 'mariadb-client-core-5.5' for glob 'mariadb*'
Note, selecting 'mariadb-plugin-mroonga' for glob 'mariadb*'
Package 'mariadb-server-5.5' is not installed, so not removed
Package 'mariadb-client-5.5' is not installed, so not removed
Package 'mariadb-client-core-5.5' is not installed, so not removed
Package 'mariadb-galera-server-10.0' is not installed, so not removed
Package 'mariadb-connect-engine-10.0' is not installed, so not removed
Package 'mariadb-oqgraph-engine-10.0' is not installed, so not removed
Package 'mariadb-tokudb-engine-10.0' is not installed, so not removed
Package 'mariadb-tokudb-engine-5.5' is not installed, so not removed
Package 'mariadb-galera-server' is not installed, so not removed
Package 'mariadb-galera-server-5.5' is not installed, so not removed
Package 'mariadb-server-core-5.5' is not installed, so not removed
Package 'mariadb-test-10.0' is not installed, so not removed
Package 'mariadb-test-5.5' is not installed, so not removed
Package 'mariadb-test-data-10.0' is not installed, so not removed
Package 'mariadb-client' is not installed, so not removed
Package 'mariadb-plugin-connect' is not installed, so not removed
Package 'mariadb-plugin-mroonga' is not installed, so not removed
Package 'mariadb-plugin-oqgraph' is not installed, so not removed
Package 'mariadb-plugin-spider' is not installed, so not removed
Package 'mariadb-plugin-tokudb' is not installed, so not removed
Package 'mariadb-server' is not installed, so not removed
Package 'mariadb-test' is not installed, so not removed
Package 'mariadb-test-data' is not installed, so not removed
The following packages were automatically installed and are no longer required:
  libcgi-fast-perl libcgi-pm-perl libdbd-mysql-perl libdbi-perl libencode-locale-perl libevent-core-2.0-5 libfcgi-perl libhtml-parser-perl libhtml-tagset-perl libhtml-template-perl libhttp-date-perl libhttp-message-perl libio-html-perl
  liblwp-mediatypes-perl libmysqlclient20 libterm-readkey-perl libtimedate-perl liburi-perl
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  mysql-client mysql-client-5.7 mysql-client-core-5.7
The following packages will be REMOVED:
  mariadb-client-10.0* mariadb-client-core-10.0* mariadb-common* mariadb-server-10.0* mariadb-server-core-10.0*
The following NEW packages will be installed:
  mysql-client mysql-client-5.7 mysql-client-core-5.7
0 upgraded, 3 newly installed, 5 to remove and 23 not upgraded.
8 not fully installed or removed.
Need to get 8,347 kB of archives.
After this operation, 2,470 kB disk space will be freed.
Do you want to continue? [Y/n] y
Get:1 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu xenial-updates/main amd64 mysql-client all 5.7.23-0ubuntu0.16.04.1 [10.0 kB]
Get:2 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu xenial-updates/main amd64 mysql-client-core-5.7 amd64 5.7.23-0ubuntu0.16.04.1 [6,675 kB]
Get:3 http://eu-central-1.ec2.archive.ubuntu.com/ubuntu xenial-updates/main amd64 mysql-client-5.7 amd64 5.7.23-0ubuntu0.16.04.1 [1,662 kB]
Fetched 8,347 kB in 0s (44.1 MB/s)
Selecting previously unselected package mysql-client.
(Reading database ... 93611 files and directories currently installed.)
Preparing to unpack .../mysql-client_5.7.23-0ubuntu0.16.04.1_all.deb ...
Unpacking mysql-client (5.7.23-0ubuntu0.16.04.1) ...
dpkg: mariadb-client-10.0: dependency problems, but removing anyway as you requested:
 dbconfig-mysql depends on mysql-client | mariadb-client | virtual-mysql-client; however:
  Package mysql-client is not configured yet.
  Package mariadb-client is not installed.
  Package virtual-mysql-client is not installed.
  Package mariadb-client-10.0 which provides virtual-mysql-client is to be removed.

(Reading database ... 93615 files and directories currently installed.)
Removing mariadb-client-10.0 (10.0.36-0ubuntu0.16.04.1) ...
Purging configuration files for mariadb-client-10.0 (10.0.36-0ubuntu0.16.04.1) ...
Removing mariadb-client-core-10.0 (10.0.36-0ubuntu0.16.04.1) ...
Processing triggers for man-db (2.7.5-1) ...
Selecting previously unselected package mysql-client-core-5.7.
(Reading database ... 93565 files and directories currently installed.)
Preparing to unpack .../mysql-client-core-5.7_5.7.23-0ubuntu0.16.04.1_amd64.deb ...
Unpacking mysql-client-core-5.7 (5.7.23-0ubuntu0.16.04.1) ...
Selecting previously unselected package mysql-client-5.7.
Preparing to unpack .../mysql-client-5.7_5.7.23-0ubuntu0.16.04.1_amd64.deb ...
Unpacking mysql-client-5.7 (5.7.23-0ubuntu0.16.04.1) ...
Processing triggers for man-db (2.7.5-1) ...
(Reading database ... 93611 files and directories currently installed.)
Removing mariadb-server-core-10.0 (10.0.36-0ubuntu0.16.04.1) ...
Removing mariadb-common (10.0.36-0ubuntu0.16.04.1) ...
Purging configuration files for mariadb-common (10.0.36-0ubuntu0.16.04.1) ...
Removing mariadb-server-10.0 (10.0.36-0ubuntu0.16.04.1) ...
Purging configuration files for mariadb-server-10.0 (10.0.36-0ubuntu0.16.04.1) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up mysql-client-core-5.7 (5.7.23-0ubuntu0.16.04.1) ...
Setting up mysql-client-5.7 (5.7.23-0ubuntu0.16.04.1) ...
Setting up mysql-client (5.7.23-0ubuntu0.16.04.1) ...
Setting up libdbi-perl (1.634-1build1) ...
Setting up libmysqlclient20:amd64 (5.7.23-0ubuntu0.16.04.1) ...
Setting up libdbd-mysql-perl (4.033-1ubuntu0.1) ...
Setting up libterm-readkey-perl (2.33-1build1) ...
Processing triggers for libc-bin (2.23-0ubuntu10) ...
ubuntu@ip-172-31-45-140:~$