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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 - The latest version of MySQL database client(最新版的mysql数据库客户端).
- mysql-server - The latest version of MySQL database server.(最新版的mysql数据库服务端)
- mysql-common - MySQL database common files(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 mysql server 和 mysql client ：
sudo apt-get --purge remove mysql-client mysql-server mysql-common sudo apt-get autoremove</div>
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)：
Reading package lists... Done Building dependency tree Reading state information... Done The following packages were automatically installed and are no longer required: linux-headers-3.2.0-31-virtual linux-headers-3.2.0-31 Use 'apt-get autoremove' to remove them. The following packages will be REMOVED: libdbd-mysql-perl* libmysqlclient18* mysql-client* mysql-client-5.5* mysql-common* mysql-server* mysql-server-5.5* 0 upgraded, 0 newly installed, 7 to remove and 0 not upgraded. After this operation, 67.5 MB disk space will be freed. Do you want to continue [Y/n]? y (Reading database ... 105097 files and directories currently installed.) Removing mysql-server ... Removing mysql-server-5.5 ... mysql stop/waiting Purging configuration files for mysql-server-5.5 ... Removing mysql-client ... Removing mysql-client-5.5 ... Removing libdbd-mysql-perl ... Removing libmysqlclient18 ... Purging configuration files for libmysqlclient18 ... Removing mysql-common ... Purging configuration files for mysql-common ... dpkg: warning: while removing mysql-common, directory '/etc/mysql' not empty so not removed. Processing triggers for ureadahead ... Processing triggers for man-db ... Processing triggers for libc-bin ... ldconfig deferred processing now taking place</div>
删除 /etc/mysql 目录，使用如下命令:
sudo rm -rf /etc/mysql/</div>
解释：-r 同时删除该目录下的所有子目录。 -f 表示强制删除