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文件/etc/resolv.conf配置DNS客户，它包含了主机的域名搜索顺序和DNS服务器的地址，每一行应包含一个关键字和一个或多个的由空格隔开的参数。下面是一个例子文件： 在/etc/resolv.conf 配置文件：domain 和search作用是一样的 下面的说明更清晰
domain linpro.no domain function: Had I typed telnet math.uio.no. with the trailing dot, the resolver would have known it was an FQDN and would have looked up math.uio.no at once, without trying to append the specified domain first. Not all applications are tolerant of the trailing dot, though, so it can't always be specified. search function: When ssh gram is executed, the resolver first looks for gram.linpro.no, which does not exist; then gram.uio.no, which does not exist, either; and finally gram.ifi.uio.no, which will succeed because it does exist
原文链接：/etc/resolv.conf中关键字search和domain的作用 |