导数据_MySQL
ln -s source dist 是产生一个连结(dist)到 source
修改mysql时，一定要记住：
1：先停止mysql服务（对所有的服务都要先停后修改）
service mysql stop 或到mysql自己的启动脚本下停止mysql.server stop
2：备份数据，（对所有的服务器操作都要保证数据不丢失）
接着做要做的修改
把所有的mysql下的文件全放到/lu/my/mysql-standard-4.0.20-pc-linux-i686下，然后
ln -s /lu/my/mysql-standard-4.0.20-pc-linux-i686 mysql
删除原来的 ln ---> unlink mysql
chown -R mysql mysqllink/ 将mysql 权限需要修改成 MYSQL
chown -R mysql mysql
最后启动mysql.server start
cp -R mysqllink /lu2/ 考贝 cp -R 源文件 目标文件 （-R 全目录）
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