>[danger]hosts文件講解 ---- 1. mac系統位置 /private/etc/hosts (windows請自己查找) 2. 常用的網址域名與其對應的IP地址建立一個關聯, 當訪問url時先匹配hosts文件里的配置, 如果未命中再提交給DNS服務器進行對應IP解析 里面代碼如下: ``` ## # 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 ``` > 當我訪問入 www.sql.com 就會直接跳轉到127.0.0.1 3. 所以我們一般在本機中屏蔽某些url, 可以在這里進行一些配置