/etc/hosts与/etc/resolv.conf

一 /etc/hosts：

(1)/etc/hosts：The static table lookup for hostnames(详情：man 5 hosts)。

(2)/etc/hosts associates IP address with hostnames，one line per IP address.

*格式：IP_address canonical_hostname [aliases...别名]

注意：通常LINUX主机查询对方的身份时,首先查询/etc/hosts文件的设置,接下来是/etc/resolv.conf的DNS主机

二 /etc/resolv.conf(DNS域名解析的配置文件)：

(1)/etc/resolv.conf：resolver configuration file(详情：man 5 resolv.conf)。