Centos 7如何重置MYSQL root密码
1.使用个人账户登陆系统（注意登陆后切换到root权限：su root）$ su root
Password:
2.停止MySQL服务。
# service mysqld stop
3.跳过授权表选项，重启MySQL。
# mysqld_safe --skip-grant-tables &
4.登陆MySQL
# 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。
# mysql -uroot -p
Enter password:
elcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.6.43 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>
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