Linux下修改MySQL数据库数据⽂件路径的步骤
使⽤rpm安装⽅式安装完MySQL数据库后，数据⽂件的默认路径为/var/lib/mysql，然⽽根⽬录并不适合⽤于存储数据⽂件。原路径：/var/lib/mysql
⽬标路径：/home/mysql_data/mysql
Linux系统版本：centos7.6
MySQL数据库版本：5.7.25
步骤：
1、创建⽬标路径
mkdir -p /home/mysql_data
2、关闭MySQL
systemctl stop mysqld
3、复制数据⽂件
cp -arp /var/lib/mysql /home/mysql_data
4、修改配置⽂件/etc/myf
将datadir和socket中的原路径修改为⽬标路径
datadir=/home/mysql_data/mysql
socket=/home/mysql_data/mysql/mysql.sock
5、启动MySQL服务
systemctl start mysqld
NOTE:
在linux中下载mysql时冲突是什么1、报错如下：
2019-12-22T08:32:42.430564Z 0 [ERROR] InnoDB: Operating system error number 13 in a file operation.
2019-12-22T08:32:42.430599Z 0 [ERROR] InnoDB: The error means mysqld does not have the access rights to the directory.
2019-12-22T08:32:42.430616Z 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2019-12-22T08:32:42.430898Z 0 [ERROR] InnoDB: The innodb_temporary data file 'ibtmp1' must be writable
2019-12-22T08:32:42.430923Z 0 [ERROR] InnoDB: The innodb_temporary data file 'ibtmp1' must be writable
2019-12-22T08:32:42.430936Z 0 [ERROR] InnoDB: Could not create the shared innodb_temporary.
2019-12-22T08:32:42.430952Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2019-12-22T08:32:43.038973Z 0 [ERROR] InnoDB: Operating system error number 13 in a file operation.
2019-12-22T08:32:43.039021Z 0 [ERROR] InnoDB: The error means mysqld does not have the access rights to the directory.
2019-12-22T08:32:43.039037Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2019-12-22T08:32:43.039046Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2019-12-22T08:32:43.039056Z 0 [ERROR] Failed to initialize builtin plugins.
2019-12-22T08:32:43.039063Z 0 [ERROR] Aborting
解决：
执⾏命令：
setenforce 1
再重新启动
2、报错如下：
Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'
解决：
修改配置⽂件myf，添加或修改如下配置：
[client]
socket = /home/mysql_data/mysql/mysql.sock
总结
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