Shulou(Shulou.com)05/31 Report--

Today, I will talk to you about the reasons why you can not find my.cnf after installing MySQL in Linux and how to restore the database from the sql statement file. Many people may not know much about it. In order to make you understand better, Xiaobian summarized the following content for you. I hope you can get something according to this article.

MySQL installed with the rpm package will not install the / etc/my.cnf file

As to why MySQL can start and function normally without this file, there are two theories here.

First, my.cnf is just a parameter file when MySQL starts. Without it, MySQL starts with the built-in default parameters.

Second, MySQL automatically uses the my-medium.cnf file in the / usr/share/ directory when it starts, which is limited to the MySQL installed by the rpm package

The solution is to copy a .cnf file from the / usr/share/mysql directory to the / etc directory and rename it my.cnf.

The file backed up with mysqldump is a SQL script that can be poured directly, and there are two ways to import the data.

Directly use the mysql client

For example:

/ usr/local/mysql/bin/mysql-uyejr-pyejr db_name < db_name.sql

Use SOURCE syntax

In fact, this is not a standard SQL syntax, but a feature provided by the mysql client, such as:

SOURCE / tmp/db_name.sql

You need to specify the absolute path to the file, and it must be a file that the mysqld running user (such as nobody) has permission to read.

After reading the above, do you have any further understanding of the reason why Linux cannot find my.cnf after installing MySQL and how to recover the database from the sql statement file? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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