1、删除所有匿名用户 drop user ''@'localhost';
2、为所有root用户设定密码 
		[交互]set password for username@hosr = password('密码');
		[交互]update mysql.user set password = password('密码') where user = 'root'; flush privileges;
		mysqladmin -uusername -hhost password '密码' -p; mysqladmin -uusername -hhost -p flush-privileges