构造类似结构如:
/etc/hosts
/etc/httpd/conf/httpd.conf 等
还有源码等
127.0.0.1 localhost.localdomain localhost.localdomain localhost4 localhost4.localdomain4 localhost b2b-86
::1 localhost.localdomain localhost.localdomain localhost6 localhost6.localdomain6 localhost b2b-86
等等