ubuntu mysql卸载重装

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