删除：
- yum remove mysql mysql-server mysql-devel mysql-libs compat-mysql51 mysql-community-client mysql-community-libs mysql-community-server mysql-community-common mysql-community-release.noarch
- rm -rf /var/lib/mysql
- rm /etc/my.cnf
- rm -rf /var/lib/mysql/
- rm -rf /usr/lib64/mysql
- rm -rf /usr/lib/mysql
- rm -rf /usr/share/mysql
- rm –rf /usr/my.cnf
- rm -rf /root/.mysql_sercret
- chkconfig –del mysqld
验证：
- yum list installed mysql*