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;