Here is the fix for “Ubuntu resolv.conf keeps getting overwritten” issue. At Bobcares, with our Server Management Services, we can handle your server issues.

Ubuntu resolv.conf keeps getting overwritten

When installing DNS Server, we might have run across an odd problem where the Resolv.conf file keeps getting overwritten after the server reboots. In this article, we will kook into two solutions from our Tech team to fix the issue.

Solution for the Issue “Ubuntu resolv.conf keeps getting overwritten”

Solution 1

1. Firstly, with the vim file editor, open the NetworkManager.conf file using below command:

   # vim /etc/NetworkManager/NetworkManager.conf
2. Then save the file after including the following in the main section of NetworkManager.conf file.

   [main]
   
   dns=none
3. Now restart the NetworkManager.service using the command:

   #sudo systemctl restart NetworkManager.service
4. Finally, add the DNS Servers in etc/resolv.conf file.

   #nameserver 1.1.1.1

The same DNS Server will now be specified even after a reboot in the /etc/resolv.conf file.

Solution 2

1. Firstly, clicking the network icon in the system tray.
2. Now select the connection we want to edit in the Network Connections box, and then click Edit.
3. On the following page, select Manual, choose IPv4 or IPv6 and then enter the required information in the subsequent box.
4. Once done, click Save. The set up the static IP address is complete now.
5. Now we have to stop dnsmasq system program which is in charge of replacing the resolv.conf file. So open a terminal and type the command:

   sudo nano /etc/NetworkManager/NetworkManager.conf.
6. Then locate the line and comment out it:

   dns=dnsmasq
7. Now click the Save button and close it.
8. Finally, restart the NetworkManager with the command:

   sudo /etc/init.d/network-manager restart

We should be able to see that the static DNS servers we specified in the network connection editor are still present in the /etc/resolv.conf file. Once networking is restarted or the computer is rebooted, the static DNS addresses will finally take effect.

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Conclusion

The procedures provided by our Support team to resolve the “Ubuntu resolv.conf keeps getting overwritten” issue are described in this post.