在Ubuntu或Debian系统的服务器上卸载MySQL的方法
对于有的vps，系统默认安装了mysql。我们需要从我们的服务器、vps上卸载(移除)默认的mysql。那么如何(怎样)在ubuntu\Debian上卸载mysql?
通常情况下，下列mysql软件包会被安装到Debian、Ubuntu中：
- mysql-client-ThelatestversionofMySQLdatabaseclient(最新版的mysql数据库客户端).
- mysql-server-ThelatestversionofMySQLdatabaseserver.(最新版的mysql数据库服务端)
- mysql-common-MySQLdatabasecommonfiles(mysql数据库命令文件)
那么如何怎样在ubuntu\Debian上卸载mysql？
只需要使用apt-get命令即可，如下面的命令，同时卸载ubuntu\Debian中的mysqlserver和mysqlclient：
sudoapt-get--purgeremovemysql-clientmysql-servermysql-common sudoapt-getautoremove
解释:--purge移除所给的软件包和配置文件
remove表示卸载软件包
autoremove表示自动卸载软件包，以及与该软件包的依赖(软件包)
输入如下(注意软件包名字)：
Readingpackagelists...Done Buildingdependencytree Readingstateinformation...Done Thefollowingpackageswereautomaticallyinstalledandarenolongerrequired: linux-headers-3.2.0-31-virtuallinux-headers-3.2.0-31 Use'apt-getautoremove'toremovethem. ThefollowingpackageswillbeREMOVED: libdbd-mysql-perl*libmysqlclient18*mysql-client*mysql-client-5.5*mysql-common*mysql-server* mysql-server-5.5* 0upgraded,0newlyinstalled,7toremoveand0notupgraded. Afterthisoperation,67.5MBdiskspacewillbefreed. Doyouwanttocontinue[Y/n]?y (Readingdatabase...105097filesanddirectoriescurrentlyinstalled.) Removingmysql-server... Removingmysql-server-5.5... mysqlstop/waiting Purgingconfigurationfilesformysql-server-5.5... Removingmysql-client... Removingmysql-client-5.5... Removinglibdbd-mysql-perl... Removinglibmysqlclient18... Purgingconfigurationfilesforlibmysqlclient18... Removingmysql-common... Purgingconfigurationfilesformysql-common... dpkg:warning:whileremovingmysql-common,directory'/etc/mysql'notemptysonotremoved. Processingtriggersforureadahead... Processingtriggersforman-db... Processingtriggersforlibc-bin... ldconfigdeferredprocessingnowtakingplace
删除/etc/mysql目录，使用如下命令:
sudorm-rf/etc/mysql/
解释：-r同时删除该目录下的所有子目录。-f表示强制删除