修改密码报异常
mysql> update user set password=password("y1jhcfzX!") where user="root";
异常
[root@ddtest-mysql01 ~]# mysql -uroot -p
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
1、修改my.cnf 跳过认证
添加 skip-grant-tables
[root@ddtest-mysql01 ~]# vi /etc/my.cnf
[mysqld]
port=3306
datadir=/mysqldata01/data
pid-file=/mysqldata01/mysql57.pid
socket=/mysqldata01/mysql57.sock
log-error=/mysqldata01/mysql57-err.log
user=mysql
skip-grant-tables
[client]
socket=/mysqldata01/mysql57.sock
2、重启
[root@ddtest-mysql01 ~]# /etc/init.d/mysqld restart
Shutting down MySQL... SUCCESS!
Starting MySQL. SUCCESS!
3、重置密码
[root@ddtest-mysql01 ~]# mysql
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.7.28 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> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> update mysql.user set password=password('y1jhcfzX!') where user='root';
Query OK, 0 rows affected, 1 warning (0.00 sec)
Rows matched: 4 Changed: 0 Warnings: 1
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> update mysql.user set authentication_string=password('y1jhcfzX!') where user='root';
Query OK, 4 rows affected, 1 warning (0.00 sec)
Rows matched: 4 Changed: 4 Warnings: 1
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
4、my.cnf 跳过认证去掉
把之前添加的skip-grant-tables 去掉或注释再重启，/etc/init.d/mysqld restart
[root@ddtest-mysql01 ~]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 11
Server version: 5.7.28 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>
mysql>
mysql> select user,host from user;
+-------+-------------+
| user | host |
+-------+-------------+
| root | 127.0.0.1 |
| root | ::1 |
| | dd-mysq01 |
| root | dd-mysq01 |
| | localhost |
| root | localhost |
+-------+-------------+
12 rows in set (0.00 sec)