- APT repository:
deb http://ftp.osuosl.org/pub/mariadb/repo/10.3/ubuntu trusty main

- Installed packages:
# dpkg -l | egrep '(mariadb|mysql|percona)'
ii  libdbd-mysql-perl                 4.025-1ubuntu0.1                           amd64        Perl5 database interface to the MySQL database
ii  libmariadb3                       1:10.3.7+maria~trusty                      amd64        MariaDB database client library
ii  libmysqlclient18                  1:10.3.7+maria~trusty                      amd64        Virtual package to satisfy external libmysqlclient18 depends
ii  mariadb-backup-10.3               10.3.5+maria~trusty                        amd64        Backup tool for MariaDB server
ii  mariadb-client                    1:10.3.7+maria~trusty                      all          MariaDB database client (metapackage depending on the latest version)
ii  mariadb-client-10.3               1:10.3.7+maria~trusty                      amd64        MariaDB database client binaries
ii  mariadb-client-core-10.3          1:10.3.7+maria~trusty                      amd64        MariaDB database core client binaries
ii  mariadb-common                    1:10.3.7+maria~trusty                      all          MariaDB database common files (e.g. /etc/mysql/conf.d/mariadb.cnf)
ii  mariadb-server                    1:10.3.7+maria~trusty                      all          MariaDB database server (metapackage depending on the latest version)
ii  mariadb-server-10.3               1:10.3.7+maria~trusty                      amd64        MariaDB database server binaries
ii  mariadb-server-core-10.3          1:10.3.7+maria~trusty                      amd64        MariaDB database core server files
ii  mysql-common                      1:10.3.7+maria~trusty                      all          MariaDB database common files (e.g. /etc/mysql/my.cnf)
ii  percona-toolkit                   3.0.10-1.trusty                            amd64        Advanced MySQL and system command-line tools
ii  percona-xtrabackup-24             2.4.12-1.trusty                            amd64        Open source backup tool for InnoDB and XtraDB