MySQL5.7.26 忘记Root密码小计

以前直接修改mysql.user就ok了，现在不行了，正好虚拟机MySQL的root密码忘记了，就简单记录下：（本方法不适合互联网线上项目，除非你不在意这段时间的损失）

PS：以UbuntuServer为例（CentOS你把配置文件的位置换下就ok了）

坑点：

1. 不能和以前一样直接修改user表了，需要使用新命令
   • alter user 'root'@'localhost' identified with mysql_native_password by '复合密码强度的新密码';
2. ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement
   • flush privileges;

修改密码

附录

dnt@ubuntuserver:~$ vi /etc/mysql/mysql.conf.d/mysqld.cnf 
dnt@ubuntuserver:~$ cat /etc/mysql/mysql.conf.d/mysqld.cnf |grep skip
skip-external-locking
# Instead of skip-networking the default is now to listen only on
skip_name_resolve=on
skip-grant-tables
dnt@ubuntuserver:~$ sudo systemctl restart mysql
dnt@ubuntuserver:~$ mysql -uroot
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.26-0ubuntu0.18.04.1 (Ubuntu)

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> select user();
+--------+
| user() |
+--------+
| root@  |
+--------+
1 row in set (0.01 sec)

mysql> alter user 'root'@'localhost' identified with mysql_native_password by 'WWW.baidu.com1';
ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

mysql> alter user 'root'@'localhost' identified with mysql_native_password by 'WWW.baidu.com1';
Query OK, 0 rows affected (0.00 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)

mysql> exit
Bye

恢复正常

附录

dnt@ubuntuserver:~$ sudo vi /etc/mysql/mysql.conf.d/mysqld.cnf 
dnt@ubuntuserver:~$ cat /etc/mysql/mysql.conf.d/mysqld.cnf |grep skip
skip-external-locking
# Instead of skip-networking the default is now to listen only on
skip_name_resolve=on
# skip-grant-tables
dnt@ubuntuserver:~$ sudo systemctl restart mysql
dnt@ubuntuserver:~$ mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.26-0ubuntu0.18.04.1 (Ubuntu)

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> select user();
+----------------+
| user()         |
+----------------+
| root@localhost |
+----------------+
1 row in set (0.00 sec)