189 8069 5689
这篇文章给大家分享的是有关MySQL如何修改root账号密码的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。
成都创新互联公司坚持“要么做到，要么别承诺”的工作理念，服务领域包括：成都做网站、网站制作、企业官网、英文网站、手机端网站、网站推广等服务，满足客户于互联网时代的和龙网站设计、移动媒体设计的需求，帮助企业找到有效的互联网解决方案。努力成为您成熟可靠的网络建设合作伙伴！
MySQL数据库中如何修改root用户的密码呢？下面总结了修改root用户密码的一些方法
1： 使用set password语句修改
mysql> select user();
+----------------+
| user() |
+----------------+
| root@localhost |
+----------------+
1 row in set (0.08 sec)
mysql> set password=password('123456');
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> exit
2: 更新mysql数据库的user表
mysql> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> update user set password=PASSWORD('QwE123') where user='root';
Query OK, 4 rows affected (0.03 sec)
Rows matched: 4 Changed: 4 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> quit
3：使用mysqladmin命令修改
命令一般为 mysqladmin -u root -p'oldpassword' password newpass 如下所示：
[root@DB-Server ~]# mysqladmin -u root -p'123456' password 'Qwe123'
Warning: Using a password on the command line interface can be insecure.
验证root密码修改是否成功
[root@DB-Server ~]# mysqladmin -u root -p'123456' password 'Qwe123'
Warning: Using a password on the command line interface can be insecure.
上面都是在知道root密码的情况下修改root密码，如果忘记了root密码，如何修改root的密码呢？
1：首先停掉MySQL服务
[root@DB-Server ~]# service mysql stop
Shutting down MySQL..[ OK ]
[root@DB-Server ~]#
或
[root@DB-Server ~]# /etc/rc.d/init.d/mysql stop
Shutting down MySQL..[ OK ]
2：然后使用mysqld_safe命令启动mysql，更新root账号的密码
--skip-grant-tables：不启动grant-tables(授权表),跳过权限控制。
--skip-networking ：跳过TCP/IP协议，只在本机访问(这个选项不是必须的。可以不用)是可以不用
[root@DB-Server ~]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &
[1] 5145
You have new mail in /var/spool/mail/root
[root@DB-Server ~]# 150709 14:10:53 mysqld_safe Logging to '/var/lib/mysql/DB-Server.localdomain.err'.
150709 14:10:53 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
[root@DB-Server ~]# mysql -u root mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.20-enterprise-commercial-advanced MySQL Enterprise Server - Advanced Edition (Commercial)
Copyright (c) 2000, 2014, 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> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)
mysql> use mysql
Database changed
mysql> UPDATE user SET password=PASSWORD("Qwe123") WHERE user='root';
Query OK, 4 rows affected (0.01 sec)
Rows matched: 4 Changed: 4 Warnings: 0
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)
mysql> exit
Bye
3：重新启动MySQL服务。
感谢各位的阅读！关于“MySQL如何修改root账号密码”这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，让大家可以学到更多知识，如果觉得文章不错，可以把它分享出去让更多的人看到吧！