mysql如何开启远程访问服务？

mysql -u root -p

welcome to the mysql monitor. commands end with ; or \g.

your mysql connection id is 6

server version: 5.6.23-log source distribution

copyright (c) 2000, 2015, 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> use mysql;

database changed

mysql> select host,user,password from user;

+———–+——+——————————————-+

| host | user | password |

+———–+——+——————————————-+

| localhost | root | *6bb4837eb74329105ee4568dda7dc67ed2ca2ad9 |

| 127.0.0.1 | root | |

| ::1 | root | |

| localhost | | |

+———–+——+——————————————-+

4 rows in set (0.00 sec)

mysql> update user set host=’%’ where user=’root’;

error 1062 (23000): duplicate entry ‘%-root’ for key ‘primary’

mysql> update user set host=’ %’ where user=’root’;

error 1062 (23000): duplicate entry ’ %-root’ for key ‘primary’

mysql> select host,user from user where user=’root’;

+———–+——+

| host | user |

+———–+——+

| % | root |

| 127.0.0.1 | root |

| ::1 | root |

+———–+——+

3 rows in set (0.00 sec)

mysql> flush privileges;

query ok, 0 rows affected (0.02 sec)

mysql> quit;

bye

./etc/init.d/mysql restart

shutting down mysql. [ ok ]

starting mysql. [ ok ]

mysql -u root -p

error 1045 (28000): access denied for user ‘root’@’localhost’ (using password: y

es)

mysql -u root -p

welcome to the mysql monitor. commands end with ; or \g.

your mysql connection id is 6

server version: 5.6.23-log source distribution

copyright (c) 2000, 2015, 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> exit;

bye

mysqladmin -uroot password 123456

mysql -uroot -p123456

welcome to the mysql monitor. commands end with ; or \g.

your mysql connection id is 6

server version: 5.6.23-log source distribution

copyright (c) 2000, 2015, 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> grant all privileges on . to ‘root’@’%’ identified by ‘123456’ with gra

nt option;

query ok, 0 rows affected (0.00 sec)

mysql> flush privileges;

query ok, 0 rows affected (0.00 sec)

解释下上面遇到的问题：

1.首先查询有没有开启远程访问（可以让任意ip通过root用户访问）

2.没有开启，则修改host=’%’，会报错：error 1062 (23000): duplicateentry ’ %-root’for key’primary’

3.忽略第二个问题，并flush privileges;（刷新mysql权限相关表，否则会报错：拒绝访问）

4.通过命令重新登录报错：error 1045 (28000): access denied for user ‘root’@’localhost’ (using password: yes)，原因是密码变成空了，重新设置密码：mysqladmin -uroot password 123456

5.这个时候访问还是报错： host ip is not allowed to connect to this mysql。通过以下两个命令即可解决，grant all privileges on . to ‘root’@’%’ identified by ‘123456’ with grant option;flush privileges;