mysql IP访问

默认情况下Linux内的mysql数据库mysql，user表内的用户权限只是对localhost即本机才能登陆。需要更改权限为以下结果：

mysql> use mysql;
Database changed
mysql> select host,user from user;
+------+------+
| host | user |
+------+------+
| %    | root |
+------+------+
1 row in set (0.00 sec)

mysql>

即将user=root的host由localhost修改为%