mysql 开放，关闭 远程授权

默认安装mysql是关闭远程连接的 这样也有助于系统的安全 但是有时候需要开启下远程连接方便操作
 
开启连接  mysql -uroot -p 进入mysql 输入密码
 
GRANT ALL PRIVILEGES ON * . * TO ‘root’@'%’ IDENTIFIED BY ‘你的mysql密码’ 


WITH GRANT OPTION MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 


MAX_UPDATES_PER_HOUR 0 ;
 
flush privileges;
 
输入这两个命令即可开启mysql远程连接
 
关闭授权
 
REVOKE ALL PRIVILEGES ON *.* FROM root@”%”;
USE mysql;
DELETE FROM user WHERE User=”root” and Host=”%”;
FLUSH PRIVILEGES;
 
在记个命令 select host,user from user where user=”root”;