使用rpm安裝方式安裝完MySQL數據庫后，數據文件的默認路徑為/var/lib/mysql，然而根目錄并不適合用于存儲數據文件。

原路徑：/var/lib/mysql

目標路徑：/home/mysql_data/mysql

Linux系統版本：centos7.6

MySQL數據庫版本：5.7.25

步驟：

1、創建目標路徑

mkdir -p /home/mysql_data

2、關閉MySQL

systemctl stop mysqld

3、復制數據文件

cp -arp /var/lib/mysql /home/mysql_data

4、修改配置文件/etc/my.cnf

將datadir和socket中的原路徑修改為目標路徑

5、啟動MySQL服務

systemctl start mysqld

NOTE:

1、報錯如下：

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

解決：

執行命令：

setenforce 1

再重新啟動

2、報錯如下：

Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'

解決：

修改配置文件my.cnf,添加或修改如下配置：

總結

以上所述是小編給大家介紹的Linux下修改MySQL數據庫數據文件路徑，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復大家的。在此也非常感謝大家對服務器之家網站的支持！
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原文鏈接：https://www.cnblogs.com/Lans-word/archive/2019/12/22/12080177.html