Nameserver Lookup: nslookup

RESOLV.CONF(5) Linux Programmer's Manual RESOLV.CONF(5) NAME top resolv.conf - resolver configuration file SYNOPSIS top /etc/resolv.conf DESCRIPTION top The resolver is a set of routines in the C library that provide access to the Internet Domain Name System (DNS). The resolver configuration file contains information that is read by the Linux and Unix DNS Configuration - SambaWiki Configuring the /etc/resolv.conf. Set the DNS server IP and AD DNS domain in your /etc/resolv.conf. For example: nameserver 10.99.0.1 search samdom.example.com Some utilities, such as NetworkManager can overwrite manual changes in that file. See your distribution's documentation for information about how to configure name resolution permanently. CentOS 7 NetworkManager Keeps Overwriting /etc/resolv.conf In CentOS or Red Hat Enterprise Linux (RHEL) 7, you can find your /etc/resolv.conf file, which holds all nameserver configurations for your server, to be overwritten by the NetworkManager.. If you check the content of /etc/resolv.conf, it may look like this. $ cat /etc/resolv.conf # Generated by NetworkManager search mydomain.tld nameserver 8.8.8.8 Ubuntu Manpage: resolv.conf - resolver configuration file Provided by: manpages_4.16-1_all NAME resolv.conf - resolver configuration file SYNOPSIS /etc/resolv.conf DESCRIPTION The resolver is a set of routines in the C library that provide access to the Internet Domain Name System (DNS). The resolver configuration file contains information that is read by the resolver routines the first time they are invoked by a process.

The “nameserver” directive. The nameserver directive points out to the IP address of a Name Server. nameserver It can be your own Name Server, some public Name Server or the Name Server of your’s ISP. Note: Up to 3 name servers may be listed. Example: nameserver 192.168.0.100 nameserver 8.8.8.8 nameserver 8.8.4.4

The glibc resolver reads /etc/resolv.conf for every resolution to determine the nameservers and options to use. resolv.conf(5) lists nameservers together with some configuration options. Nameservers listed first are tried first, up to three nameservers may be listed. Lines starting with a … Set permanent DNS nameservers on Ubuntu or Debian with Jun 11, 2020

How To Set Permanent DNS Nameservers in Ubuntu and Debian

Apr 30, 2016