1、停止服务:sudo service mysql stop
2、卸载MySQL:
(1)sudo apt-get --purge remove mysql-server
(2)sudo apt-get --purge remove mysql-client
(3)sudo apt-get --purge remove mysql-common
3、清理残余
(1)sudo apt-get autoremove
(2)sudo apt-get autoclean
(3)rm /etc/mysql/ -R
(4)rm /var/lib/mysql/ -R