>[danger]hosts文件讲解 ---- 1. mac系统位置 /private/etc/hosts (windows请自己查找) 2. 常用的网址域名与其对应的IP地址建立一个关联, 当访问url时先匹配hosts文件里的配置, 如果未命中再提交给DNS服务器进行对应IP解析 里面代码如下: ``` ## # Host Database # # localhost is used to configure the loopback interface # when the system is booting. Do not change this entry. ## 127.0.0.1 localhost 127.0.0.1 www.tp5.com 127.0.0.1 www.sql.com 192.168.3.106 www.lidongxu.com 0.0.0.0 account.jetbrains.com 255.255.255.255 broadcasthost ::1 localhost 127.0.0.1 lidongxu-2.local # added by Apache Friends XAMPP 127.0.0.1 promote.cache-dns.local # added by Apache Friends XAMPP ``` > 当我访问入 www.sql.com 就会直接跳转到127.0.0.1 3. 所以我们一般在本机中屏蔽某些url, 可以在这里进行一些配置