MySQL修改root账号密码的方法

3:重新启动MySQL服务。

MySQL修改root账号密码,mysqlroot账号

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()         |

 ---------------- 

| [email protected] |

 ---------------- 

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:

[[email protected] ~]# 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

[[email protected] ~]# mysql -u root -p'Qwe123' -e 'show databases';

Warning: Using a password on the command line interface can be insecure.

 -------------------- 

| Database           |

 -------------------- 

| information_schema |

| mysql              |

| performance_schema |

| test               |

 -------------------- 

 

 

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

 

[[email protected] ~]# service mysql stop

Shutting down MySQL..[  OK  ]

[[email protected] ~]# 

 

或

 

[[email protected] ~]# /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

[[email protected] ~]# mysqld_safe --user=mysql --skip-grant-tables --skip-networking &

[1] 5145

You have new mail in /var/spool/mail/root

[[email protected] ~]# 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

 

[[email protected] ~]# 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。

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...

[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

2: 更新mysql数据库的user表

太阳集团所有网址16877 1

    --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

    --skip-grant-tables:不启动grant-tables(授权表),跳过权限控制。

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?

太阳集团所有网址16877, 

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3:使用mysqladmin命令修改

[root@DB-Server ~]# service mysql stop
Shutting down MySQL..[ OK ]
[root@DB-Server ~]# 

1:首先停掉MySQL服务

验证root密码修改是否成功

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