mysql 5.7 忘记root密码

背景

今天突然手抖了一下，不小心把navicat中mysql的连接删掉了，当我想再次连接到mysql时才发现密码不记得了。马上百度了一下，发现还是有解决办法的，悬着的心这才放下来。

1.编辑 /etc/my.cnf 文件，在 [mysqld]配置中增加一句 skip-grant-tables

vim /etc/my.cnf

symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
# 新增
skip-grant-tables

2.重启mysql

systemctl restart mysqld

3.登陆mysql，不用输入用户名，密码，直接回车就可以。

[root@localhost ~]# mysql -uroot 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.28 MySQL Community Server (GPL)

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> 

4.重置root密码

mysql> flush privileges;
mysql> alter user 'root'@'localhost'   identified by 'your 新密码' ;

5.退出mysql命令行，编辑 /etc/my.cnf 删除 skip-grant-tables，再次重启mysql

# 删除这条配置
skip-grant-tables
systemctl restart mysqld

6.使用新密码登陆mysql

[root@localhost ~]# mysql -uroot -p 
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.28 MySQL Community Server (GPL)

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>