resolvconf，name server information handler
Resolvconf is a framework for keeping up to date the system’s

between programs that supply this information (such as ifup and
ifdown, DHCP clients, the PPP daemon and local name servers) and
programs that use this information (such as DNS caches and resolver
libraries).
.
This package may require some manual configuration. Please
read the README file for detailed instructions.

安装的可执行程序

resolvconf

「resolvconf」 and 「openresolv」

openresolv – the DNS management framework: https://roy.marples.name/projects/openresolv

参考文献

Homepage: http://alioth.debian.org/projects/resolvconf/
Wikipedia / resolvconf: https://en.wikipedia.org/wiki/Resolvconf