环境：CentOS6.8Mariadb:5.5.61下载commoncompatclientserver四个包删除相关的mysql包；rpm-qa|grepmysql然后yumremovemysqlxxxrpm-i--force--nodepscommon.rpmrpm-i--force--nodepscompat.rpmrpm-iclient.rpmrpm-iserver.rpm/etc/init.d/mysqlstart修改root用户密码：'/usr/bin/mysqladmin'-urootpassword'123