删除mysql
1.sudo apt-get autoremove --purge mysql-server-5.5
2.sudo apt-get remove mysql-common
清理残留数据
dpkg -l |grep ^rc|awk '{print $2}' |sudo xargs dpkg -P
重新安装mysql
1.sudo apt-get install mysql-server
2.sudo apt-get install mysql-client
3.sudo apt-get install php5-mysql
