apt-get update
apt-get upgrade
apt-get install mysql-server mysql-client
完全删除mysql
803 apt-get autoremove mysql-server
804 apt-get autoremove -purge mysql-server
805 apt-get autoremove -purge mysql-server-5.5
806 apt-get autoremove mysql-server-5.5
807 apt-get remove mysql-common
808 dpkg -l |grep ^rc|awk '{print $2}' |sudo xargs dpkg -P
809 mysql
810 cd /var/run/mysqld/
811 apt-get autoremove mysql
812 apt-get autoremove mysql-server
813 apt-get autoremove mysql-client
814 apt-get autoremove mysql-common
815 mysql
816 history