When I tried to start mariadb, I got:
[root]# systemctl start mariadb
Failed to start mariadb.service: Unit not found.
And I also got this message:
Package 1:mariadb-5.5.56-2.el7.x86_64 is obsoleted by mysql-community-client-5.6.39-2.el7.x86_64 which is already installed
What should I do next?
systemctl start mysql