一、系统命令
mysqladmin命令修改root密码
rshine@Ubunt14:~$ mysqladmin -uroot -p password "Admin@123456" # mysqladmin命令修改root密码，“Admin@123456”为修改后的密码
Enter password: # 输入旧密码
Warning: Using a password on the command line interface can be insecure.
rshine@Ubunt14:~$
rshine@Ubunt14:~$
二、mysql命令设置新密码
set password for root@"localhost"=password("新密码");
rshine@Ubunt14:~$ mysql -uroot -p # 旧密码登录MySQL
Enter password: # 输入旧密码
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 48
Server version: 5.6.33-0ubuntu0.14.04.1 (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> set password for root@localhost=password("Admin@123456!"); # mysql set命令修改密码，“Admin@123456!”为修改后的密码
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges; # 刷新权限
Query OK, 0 rows affected (0.00 sec)
mysql>
三、修改MySQL存储密码字段的值
命令：update mysql.user set password=password("Admin@123456") where user="root" and host="localhost";
rshine@Ubunt14:~$ mysql -uroot -p # 旧密码登录MySQL
Enter password: # 输入旧密码
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 54
Server version: 5.6.33-0ubuntu0.14.04.1 (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> update mysql.user set password=password("Admin@123456") where user="root" and host="localhost"; # update 修改存储密码字段的值
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1 Changed: 0 Warnings: 0
mysql> flush privileges; # 刷新权限
Query OK, 0 rows affected (0.00 sec)
