前言

• CentOS
• 5.6.51 MySQL Community Server (GPL)
• 查看MySQL的版本

修改密码的方法

• 改表
• ALTER USER
• SET PASSWORD

改表

mysql> select user();
+----------------+
| user()         |
+----------------+
| test@localhost |
+----------------+
1 row affected (0.00 sec)
mysql> UPDATE `user` SET `password`=PASSWORD('MyNewPass4!') WHERE `user`='root' AND `host`='localhost'; 
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0
mysql> FLUSH PRIVILEGES;
Query OK, 1 row affected (0.00 sec)

SET PASSWORD

修改当前登录用户的密码

mysql> select user();
+----------------+
| user()         |
+----------------+
| test@localhost |
+----------------+
1 row in set (0.00 sec)
mysql> set password=password('MyNewPass4!');
Query OK, 0 rows affected (0.00 sec)

• user() 方法将返回当前用户信息

修改其他人的密码

mysql> set password for 'test'@'localhost' = password('MyNewPass4!');

ALTER USER

修改当前登录用户的密码

mysql> select user();
+----------------+
| user()         |
+----------------+
| test@localhost |
+----------------+
1 row in set (0.00 sec)mysql> alter user 'test'@'localhost' identified by 'MyNewPass4!';
Query OK, 0 rows affected (0.00 sec)

修改其他人的密码

mysql> alter user 'test'@'localhost' identified by 'MyNewPass4!';

密码立即过期：

mysql> alter user 'test'@'localhost' identified by 'MyNewPass4!' password expire;

密码永不过期：

mysql> alter user 'test'@'localhost' identified by 'MyNewPass4!' password expire never;

密码按默认时间过期：

mysql> alter user 'test'@'localhost' identified by 'MyNewPass4!' password expire default;

密码90天后过期：

mysql> alter user 'test'@'localhost' identified by 'MyNewPass4!' password expire interval 90 day;

查看加密后的密码

mysql> select Host,User,Password from user;
+-----------+------+-------------------------------------------+
| Host      | User | Password                                  |
+-----------+------+-------------------------------------------+
| localhost | root | *3A39392171B03872AB76C33513E6534B4BE36F38 |
| 5kqzr     | root |                                           |
| 127.0.0.1 | root | *3A39392171B03872AB76C33513E6534B4BE36F38 |
| ::1       | root | *3A39392171B03872AB76C33513E6534B4BE36F38 |
| localhost |      |                                           |
| 5kqzr     |      |                                           |
| %         | root | *3A39392171B03872AB76C33513E6534B4BE36F38 |
+-----------+------+-------------------------------------------+
7 rows in set (0.00 sec)

参考

https://blog.csdn.net/feritylamb/article/details/124872763