How To Set Permanent DNS Nameservers in Ubuntu and Debian | Linux Today
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How To Set Permanent DNS Nameservers in Ubuntu and Debian

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Tecmint
Oct 12, 2019

The /etc/resolv.conf is the main configuration file for the DNS name resolver library. The resolver is a set of functions in the C library that provide access to the Internet Domain Name System (DNS). The functions are configured to check entries in the /etc/hosts file, or several DNS name servers, or to use the host’s database of Network Information Service (NIS).
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Tecmint

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