使用rpm安裝方式安裝完MySQL資料庫後，資料檔案的預設路徑為/var/lib/mysql，然而根目錄並不適合用於儲存資料檔案。

原路徑：/var/lib/mysql

目標路徑：/home/mysql_data/mysql

Linux系統版本：centos7.6

MySQL資料庫版本：5.7.25

步驟：

1、建立目標路徑

mkdir -p /home/mysql_data

2、關閉MySQL

systemctl stop mysqld

3、複製資料檔案

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

4、修改配置檔案/etc/my.cnf

將datadir和socket中的原路徑修改為目標路徑

datadir=/home/mysql_data/mysql
socket=/home/mysql_data/mysql/mysql.sock

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：

修改配置檔案my.cnf,新增或修改如下配置：

[client]
socket = /home/mysql_data/mysql/mysql.sock

總結

以上所述是小編給大家介紹的Linux下修改MySQL資料庫資料檔案路徑，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回覆大家的。在此也非常感謝大家對我們網站的支援！
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