一、关闭mysql.
$ service mysqld stop


二、将/data/mysql下的mysql目录mv（移动）到data目录。

mysql> show variables like 'datadir';
+---------------+-----------------+
| Variable_name | Value|
+---------------+-----------------+
| datadir| /data/mysql/|
+---------------+-----------------+
1 row in set (0.00 sec)

mysql> show variables like 'socket';
+---------------+--------------------------+
| Variable_name | Value|
+---------------+--------------------------+
| socket| /data/mysql/mysql.sock|
+---------------+--------------------------+
1 row in set (0.00 sec)

mysql>

$ mv -R /data/mysql /data/mysql_new


三、修改mysql配置文件/etc/my.cnf。将datadir和socket的路径改为/data/mysql_new目录下。


[mysqld]
#datadir=/data/mysql ------原系统默认路径
datadir=/data/mysql_new ------现有路径
#socket=/data/mysql/mysql.sock------原socket路径现
socket=/data/mysql_new/mysql.sock------现有路径


四、启动mysql.
service mysqld start