2009-10-20
简言之：主机名 to IP地址，功能类似DNS，但与DNS不同的是hosts文件是本地系统管理员可控的。
The /etc/hosts file on linux is a computer file used by an operating system to map hostnames to IP addresses.
Unlike DNS, the hosts file is under the control of the local computer's administrator.
文件格式：
IP地址 ...
pttaag@2011-12-12