Linux下更改MySQL的数据库目录今天要在一台双线云主机上安装 MySQL 数据库，操作系统为 CentOS 5.8，因为该机安装的时候 / 分区只

Linux下更改MySQL的数据库目录

今天要在一台双线云主机上安装 MySQL 数据库，操作系统为 CentOS 5.8，因为该机安装的时候 / 分区只有20G，，还有一个 300G 的扩展磁盘分区挂载在 /disk ，因此需要将 MySQL 的数据库目录设置在 /disk/mysql ，下面是具体操作步骤。

操作系统：CentOS 5.8

MySQL 版本：5.5.25

目标：更改MySQL数据库目录

源目录：/var/lib/mysql （系统默认目录）

目标目录：/disk/mysql

如果已经有，则跳过。MySQL 最新版本为 5.5.25

-bash-3.2# rpm -qa | grep MySQL

-bash-3.2# mkdir -p setup
-bash-3.2# cd setup/
-bash-3.2# wget "http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-client-5.5.25-1.rhel5.i386.rpm/from/http://mirror.csclub.uwaterloo.ca/mysql/"
--2012-06-06 16:48:29-- ://mirror.csclub.uwaterloo.ca/mysql/
2012-06-06 16:49:52 (216 KB/s) - `MySQL-client-5.5.25-1.rhel5.i386.rpm' saved [17860149/17860149]

-bash-3.2# wget "http://dev.mysql.com/get/Downloads/MySQL-5.5/MySQL-server-5.5.25-1.rhel5.i386.rpm/from/http://mysql.mirror.iweb.ca/"
--2012-06-06 16:50:01-- ://mysql.mirror.iweb.ca/

2012-06-06 16:57:11 (132 KB/s) - `MySQL-server-5.5.25-1.rhel5.i386.rpm' saved [545826/545826]

-bash-3.2# rpm -ivh MySQL-server-5.5.25-1.rhel5.i386.rpm MySQL-client-5.5.25-1.rhel5.i386.rpm
error: Failed dependencies:
libaio.so.1 is needed by MySQL-server-5.5.25-1.rhel5.i386
libaio.so.1(LIBAIO_0.1) is needed by MySQL-server-5.5.25-1.rhel5.i386
libaio.so.1(LIBAIO_0.4) is needed by MySQL-server-5.5.25-1.rhel5.i386

-bash-3.2# yum install -y libaio

Installed:
libaio.i386 0:0.3.106-5

Complete!
-bash-3.2# rpm -ivh MySQL-server-5.5.25-1.rhel5.i386.rpm MySQL-client-5.5.25-1.rhel5.i386.rpm
Preparing... ########################################### [100%]
1:MySQL-client ########################################### [ 50%]
2:MySQL-server ########################################### [100%]

PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:

/usr/bin/mysqladmin -u root password 'new-password'
/usr/bin/mysqladmin -u root -h localhost password 'new-password'

Alternatively you can run:
/usr/bin/mysql_secure_installation

which will also give you the option of removing the test
databases and anonymous user created by default. This is
strongly recommended for production servers.

See the manual for more instructions.

Please report any problems with the /usr/bin/mysqlbug script!

-bash-3.2#

如果MySQL服务器正在运行，应该先将其停止。

我因为刚安装好，所以并未运行。

-bash-3.2# service mysql stop
ERROR! MySQL server PID file could not be found!
-bash-3.2# service mysql status
ERROR! MySQL is not running

-bash-3.2# mv /var/lib/mysql /disk

-bash-3.2# ls /disk/
logs lost+found mysql
-bash-3.2#

[client]
default-character-set=gbk
socket=/disk/mysql/mysql.sock

[mysqld]
character-set-server=gbk
socket=/disk/mysql/mysql.sock