以下指南将为您提供有关如何在Linux上重设管理根密码的简单步骤。
停止MySQL
首先，停止MySQL服务器：
# service mysql stop
* Stopping MySQL database server mysqld [ OK ]
启动MySQL服务器>
启动您的MySQL服务器，但是跳过所有主要特权和联网：
# mkdir -p /var/run/mysqld
# chown mysql:mysql /var/run/mysqld
# /usr/sbin/mysqld --skip-grant-tables --skip-networking &
[1] 8142
登录到MySQL
接下来，以root用户身份登录MySQL，无需输入密码：
# mysql -u root
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.12-0ubuntu1 (Ubuntu)
Copyright (c) 2000, 2016, 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>
同花顺特权
mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected, 6 warnings (0.02 sec)
mysql>
设定新密码
接下来，将新的root密码设置为eg。linuxconfig然后退出：
mysql> SET PASSWORD FOR root@'localhost' = PASSWORD('linuxconfig');
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql> quit
Bye
重启MySQL数据库
优雅地停止当前的mysql进程：
# kill %1
[1]+ Done /usr/sbin/mysqld --skip-grant-tables --skip-networking
接下来，我们需要启动MySQL数据库：
# service mysql start
使用新密码登录
# mysql -u root --password=linuxconfig
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.7.12-0ubuntu1 (Ubuntu)
Copyright (c) 2000, 2016, 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>