mysql 5.7.26 忘记root密码

1、关闭mysql

[root@mysql ~]# /etc/init.d/mysqld stop
Shutting down MySQL.. SUCCESS!

2、修改参数文件/etc/my.cnf

[root@mysql ~]# cat /etc/my.cnf
[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/data/3306/data
log_bin=/data/3306/binlog
port=3306
server_id=2
socket=/tmp/mysql.sock
skip-grant-tables
[mysql]
socket=/tmp/mysql.sock

3、启动mysql

[root@mysql ~]# /etc/init.d/mysqld start
Starting MySQL. SUCCESS!

4、修改root密码

mysql> alter user 'root'@'localhost' identified with mysql_native_password by 'mysql';
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 (0.00 sec)

mysql> alter user 'root'@'localhost' identified with mysql_native_password by 'mysql';
Query OK, 0 rows affected (0.01 sec)

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

mysql> exit

5、关闭mysql

[root@mysql ~]# /etc/init.d/mysqld stop
Shutting down MySQL.. SUCCESS!

6、修改参数文件

[root@mysql ~]# cat /etc/my.cnf
[mysqld]
user=mysql
basedir=/usr/local/mysql
datadir=/data/3306/data
log_bin=/data/3306/binlog
port=3306
server_id=2
socket=/tmp/mysql.sock
#skip-grant-tables       ----注释
[mysql]
socket=/tmp/mysql.sock

7、启动mysql

[root@mysql ~]# /etc/init.d/mysqld start
Starting MySQL. SUCCESS!

8、使用新密码登录数据库

[root@mysql ~]# 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-log MySQL Community Server (GPL)

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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>

9、修改成功