Linux：mysql允许远程连接

更新到2018-6-27

现在使用   阿里云  服务器，关于远程连接MySQL的问题 首先要看看你的  阿里云 服务器 是否设置，开放了3306 端口。

然后再进行如下操作。

（其实很多  服务器  有上一步以后 ，就可以使用了。另：MySQL5.6   和  MySQL5.7  具体库表 里面的字段也有所不同）

1.查看linux防火墙是否开放3306端口

执行iptables -nL --line-number 
 
这里显示DROP代表防火墙阻止了3306端口。

2.添加防火墙例外

执行vim /etc/sysconfig/iptables 

3.重启防火墙

执行service iptables restart 
查看是否变为ACCEPT

4.创建远程连接用户并授权

mysql> select Host,User,Password from mysql.user;
+----------------+------------------+-------------------------------------------+
| Host           | User             | Password                                  |
+----------------+------------------+-------------------------------------------+
| localhost      | root             | *836E233974EBE6EA32F95F890A91363F8427F78B |
| iz94926clkiz   | root             | *836E233974EBE6EA32F95F890A91363F8427F78B |
| 127.0.0.1      | root             | *836E233974EBE6EA32F95F890A91363F8427F78B |
| ::1            | root             | *836E233974EBE6EA32F95F890A91363F8427F78B |
| localhost      | debian-sys-maint | *1460ED3535ABDBB887F9E5F57F40A2354610CDF3 |
+----------------+------------------+-------------------------------------------+
rows in set (0.00 sec)

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创建用户

create user test identified by '123456';

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+----------------+------------------+-------------------------------------------+
| Host           | User             | Password                                  |
+----------------+------------------+-------------------------------------------+
| localhost      | root             | *836E283974EBE6EA32F95F890A91363F8427F78B |
| iz949s6clkiz   | root             | *836E283974EBE6EA32F95F890A91363F8427F78B |
| 127.0.0.1      | root             | *836E283974EBE6EA32F95F890A91363F8427F78B |
| ::1            | root             | *836E283974EBE6EA32F95F890A91363F8427F78B |
| localhost      | debian-sys-maint | *1460ED35E5ABDBB887F9E5F57F40A2354610CDF3 |
| %              | test             | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+----------------+------------------+-------------------------------------------+
rows in set (0.00 sec)

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授权

grant all privileges on *.* to 'test'@'%'identified by '123456' with grant option;
flush privileges;

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修改用户密码

update mysql.user set password=password('新密码') where User="test" and Host="localhost";

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删除用户

delete from user where User='test' and Host='localhost';

• 1

更新到2018-6-27

现在使用   阿里云  服务器，关于远程连接MySQL的问题 首先要看看你的  阿里云 服务器 是否设置，开放了3306 端口。

然后再进行如下操作。

（其实很多  服务器  有上一步以后 ，就可以使用了。另：MySQL5.6   和  MySQL5.7  具体库表 里面的字段也有所不同）

1.查看linux防火墙是否开放3306端口

执行iptables -nL --line-number 
 
这里显示DROP代表防火墙阻止了3306端口。

2.添加防火墙例外

执行vim /etc/sysconfig/iptables 

3.重启防火墙

执行service iptables restart 
查看是否变为ACCEPT

4.创建远程连接用户并授权

mysql> select Host,User,Password from mysql.user;
+----------------+------------------+-------------------------------------------+
| Host           | User             | Password                                  |
+----------------+------------------+-------------------------------------------+
| localhost      | root             | *836E233974EBE6EA32F95F890A91363F8427F78B |
| iz94926clkiz   | root             | *836E233974EBE6EA32F95F890A91363F8427F78B |
| 127.0.0.1      | root             | *836E233974EBE6EA32F95F890A91363F8427F78B |
| ::1            | root             | *836E233974EBE6EA32F95F890A91363F8427F78B |
| localhost      | debian-sys-maint | *1460ED3535ABDBB887F9E5F57F40A2354610CDF3 |
+----------------+------------------+-------------------------------------------+
rows in set (0.00 sec)

• 1
• 2
• 3
• 4
• 5
• 6
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• 8
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• 10
• 11

创建用户

create user test identified by '123456';

• 1

+----------------+------------------+-------------------------------------------+
| Host           | User             | Password                                  |
+----------------+------------------+-------------------------------------------+
| localhost      | root             | *836E283974EBE6EA32F95F890A91363F8427F78B |
| iz949s6clkiz   | root             | *836E283974EBE6EA32F95F890A91363F8427F78B |
| 127.0.0.1      | root             | *836E283974EBE6EA32F95F890A91363F8427F78B |
| ::1            | root             | *836E283974EBE6EA32F95F890A91363F8427F78B |
| localhost      | debian-sys-maint | *1460ED35E5ABDBB887F9E5F57F40A2354610CDF3 |
| %              | test             | *6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9 |
+----------------+------------------+-------------------------------------------+
rows in set (0.00 sec)

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授权

grant all privileges on *.* to 'test'@'%'identified by '123456' with grant option;
flush privileges;

• 1
• 2

修改用户密码

update mysql.user set password=password('新密码') where User="test" and Host="localhost";

• 1

删除用户

delete from user where User='test' and Host='localhost';

• 1