[root@localhost /]# service mySQLd stop
redirecting to /bin/Systemctl stop mysqld.service

[root@localhost /]# rpm -qa|grep -i mysql
mysql-commUnity-client-8.0.13-1.el7.x86_64
mysql-communITy-libs-8.0.13-1.el7.x86_64
mysql-community-common-8.0.13-1.el7.x86_64
mysql-community-server-8.0.13-1.el7.x86_64

[root@localhost /]# rpm -ev mysql-community-client-8.0.13-1.el7.x86_64

[root@localhost /]# rpm -ev mysql-community-client-8.0.13-1.el7.x86_64 --nodeps

[root@localhost /]# find / -name mysql
/VAR/lib/mysql
/var/lib/mysql/mysql
/usr/lib64/mysql
/usr/share/mysql
[root@localhost /]# rm -rf /var/lib/mysql
[root@localhost /]# rm -rf /var/lib/mysql/mysql
[root@localhost /]# rm -rf /usr/lib64/mysql
[root@localhost /]# rm -rf /usr/share/mysql

[root@localhost /]# rm -rf /etc/my.cnf

[root@localhost /]# rpm -qa|grep -i mysql