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

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

删除 /etc/mysql 目录，使用如下命令:

sudo rm -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