Ubuntu 20.04 Server: How to change DNS and domain name
In the new Ubuntu version, you cannot change
/etc/resolv.conf. You can change it. But it won’t last a restart. It will be replaced by
I wanted to change the domain name and DNS/nameserver. If you look at
man 8 systemd-resolved, you can see you have to change a different file called
Please change your
resolved.conf file accordingly. My Domain Name server is
10.0.2.15. I set my domain name as
dedunu.info. I added Google DNS as Fallback DNS.
$ cat /etc/systemd/resolved.conf # This file is part of systemd. # # systemd is free software; you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as published by # the Free Software Foundation; either version 2.1 of the License, or # (at your option) any later version. # # Entries in this file show the compile time defaults. # You can change settings by editing this file. # Defaults can be restored by simply deleting this file. # # See resolved.conf(5) for details [Resolve] DNS=10.0.2.15 FallbackDNS=18.104.22.168 Domains=dedunu.info #LLMNR=no #MulticastDNS=no #DNSSEC=no #DNSOverTLS=no #Cache=yes #DNSStubListener=yes #ReadEtcHosts=yes
I had to restart the server to apply the configuration.