MySQL远程访问权限，同时允许远程连接和本地连接

1、登陆mysql数据库mysql -u root -pmysql> use mysql;Database changedmysql> select host,user,password from user;+--------------+------+-------------------------------------------+| host | user | password |+--------------+------+-------------------------------------------+| localhost | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E || centos | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E || 127.0.0.1 | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |+--------------+------+-------------------------------------------+2 rows in set (0.00 sec)可以看到在user表中已创建的root用户。host字段表示可以登录的主机，其值可以用IP，也可用主机名，现在是有三个本地HOST可以登录，现在可以将host为centos改为远程主机都可以访问，即update user set host = ’%’ where user = ’root’ and host = ‘centos’；改后表结构：+--------------+------+-------------------------------------------+| host | user | password |+--------------+------+-------------------------------------------+| localhost | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E || % | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E || 127.0.0.1 | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |+--------------+------+-------------------------------------------+此时本地主机localhost和127.0.0.1可用于本地登录，%表示允许所有远端登录然后执行

mysql> flush privileges;     立即生效

mysql> quit;

现在便可在本地或者远端登录了。

2、实现远程连接(授权法)   将host字段的值改为%就表示在任何客户端机器上能以root用户登录到mysql服务器，建议在开发时设为%。      update user set host = ’%’ where user = ’root’;   将权限改为ALL PRIVILEGESmysql> use mysql;Database changedmysql> grant all privileges  on *.* to root@'%' identified by "root";Query OK, 0 rows affected (0.00 sec)  www.2cto.com  mysql> select host,user,password from user;+--------------+------+-------------------------------------------+| host         | user | password                                  |+--------------+------+-------------------------------------------+| localhost    | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E || 127.0.0.1    | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E || %            | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |+--------------+------+-------------------------------------------+3 rows in set (0.00 sec)这样机器就可以以用户名root密码root远程访问该机器上的MySql.

| localhost | root | *A731AEBFB621E354CD41BAF207D884A609E81F5E |