Answers for "Starting mysql (via systemctl): mysql.serviceJob for mariadb.service failed because the control process exited with error code. See "systemctl status mariadb.service" and "journalctl -xe" for details."

job for mariadb.service failed because the control process exited with error code. see "systemctl status mariadb.service" and "journalctl -xe" for details.

If you dont have any real data in your database then clear all in /var/lib/mysql.

After that try again to run command mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql to initialize database directory.