以下代码照顺序执行
sudo apt-get autoremove –purge mysql-server-5.7 //注意要看对应删除自己的版本号
sudo apt-get remove mysql-server
sudo apt-get autoremove mysql-server
sudo apt-get remove mysql-common //这个很重要
sudo dpkg –remove mysql-serversudo
//重装
apt-get purge -f mysql-server mysql-commonsudo
apt-get install mysql-server mysql-common
sudo rm /var/lib/mysql/ -R
sudo rm /etc/mysql/ -R
sudo apt-get autoremove mysql* –purge
sudo apt-get remove apparmor
sudo apt-get install mysql-server mysql-common
http://www.cnblogs.com/xusir/p/3342722.html
http://www.cnblogs.com/steven_oyj/archive/2010/05/24/1742808.html