Ubuntu 删除mysql 和安装mysql

删除Mysql ：

删除mysql前 先删除一下 /var/lib/mysql 还有 /etc/mysql

->sudo rm /var/lib/mysql/-R

-> sudo rm /etc/mysql/-R

-> sudo apt-getautoremove mysql*--purge

-> sudo apt-getremove apparmor

-> ssudo apt-getinstall mysql-servermysql-common

http://www.jianshu.com/p/4646a60637a1

http://www.jianshu.com/p/8252f1e41d50