1.使用个人账户登陆系统（注意登陆后切换到root权限：su root）

[nsroot@COS7-PY ~]$ su rootPassword:

2.停止MySQL服务。

[root@COS7-PY nsroot]# service mysqld stop

3.跳过授权表选项，重启MySQL。

[root@COS7-PY nsroot]# mysqld_safe --skip-grant-tables &

4.登陆MySQL

[root@COS7-PY nsroot]# mysql

5.在登陆MySQL 成功后使用命令重置root密码：

mysql> UPDATE mysql.user SET Password=PASSWORD('NEW-PASSWORD') WHERE User='root';

6.退出MySQL，

mysql>FLUSH PRIVILEGES;mysql>EXIT;

7.使用更改后的密码，停止MySQL

mysql>mysqladmin -u root -p shutdown

8.启动MySQL服务。

mysql>service mysqld start

9.使用新密码登陆MySQL。

[root@COS7-PY nsroot]# mysql -uroot -pEnter password: elcome to the MySQL monitor. Commands end with ; or \g.Your MySQL connection id is 2Server version: 5.6.43 MySQL Community Server (GPL)

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