centos8下给mysql设置密码

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原文链接：https://www.cnblogs.com/ttrrpp/p/12720627.html

在CentOS8上安装MySQL8.0后，由于默认的密码认证插件更改，通过旧方法无法直接设置root密码。本文详细介绍了如何使用`ALTER USER`命令切换回`mysql_native_password`插件并设置新密码，以及验证新密码生效的过程。

centos8下给mysql设置密码

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(base) [root@localhost tushare]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 8.0.17 Source distribution

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

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修改root密码

在MySQL 8.04前，执行：SET PASSWORD=PASSWORD(‘[新密码]’);但是MySQL8.0.4开始，这样默认是不行的。因为之前，MySQL的密码认证插件是“mysql_native_password”，而现在使用的是“caching_sha2_password”。

修改密码为123456（密码可以设置为任意值）：

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mysql> use mysql;
use mysql;
^C
mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456';
Query OK, 0 rows affected (0.01 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

mysql> quit
Bye

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用密码进入mysql命令行

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(base) [root@localhost tushare]# mysql -uroot -p123456
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 26
Server version: 8.0.17 Source distribution

Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql>