December 2018
Beginner
826 pages
22h 54m
English
Content preview from Linux Administration Cookbook
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Checking the domain resolution settings
The source of truth when it comes to DNS configuration on a system is generally the resolver file, /etc/resolv.conf, although increasingly this file isn't used directly, and is instead managed by external programs.
In the case of CentOS, the resolv.conf file is managed by our friend network manager, and on other systems, it might be systemd-resolved.
Have a look at your resolv.conf file:
$ cat /etc/resolv.conf # Generated by NetworkManagersearch discworldnameserver 10.0.2.3
search in the previous code is the search list for hostname lookup. It's generated by looking at the domain the box is sitting on.
nameserver is the value of our DNS resolver, in this case, the VirtualBox default.
This tells us that ...
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