mysql 允许远程PC连接和修改root 密码

1.修改root用户密码
mysqladmin -u root -p password 'root'  #修改root密码

2.创建远程用户访问(username:bamysql passwd:123456)
grant select,update,insert,delete on *.* to bamysql@'%' identified by "123456";

========下面值允许在某台主机名为centos6-2上 发起远程访问========
GRANT ALL PRIVILEGES ON *.* TO 'root'@'centos6-2' WITH GRANT OPTION;
GRANT PROXY ON ''@'' TO 'root'@'centos6-2' WITH GRANT OPTION;

//centos6-2为新安装的centos系统的主机名