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Asked: 2024-09-26T21:52:55+05:30 In:

How can I resolve issues with DNS resolution not functioning properly after upgrading to Ubuntu 13.10?

So, I recently decided to upgrade my system to Ubuntu 13.10, thinking it would enhance my experience with smoother performance and all that good stuff. But ever since I completed the upgrade, I’ve been running into some major headaches with DNS resolution.

At first, I thought it might just be a temporary glitch after the upgrade, but it’s becoming more than just a minor nuisance. Websites are taking ages to load, and sometimes I can’t connect to them at all. I’m starting to pull my hair out here! I’ve tried basic troubleshooting, like flushing the DNS cache and restarting the network services, but nothing seems to change.

I checked my DNS settings in the Network Manager and everything looks correct, but clearly, something’s off. I’ve even gone in and manually set my DNS servers to Google’s 8.8.8.8 and 8.8.4.4, thinking that might help, but still no luck.

Does anyone have any idea what’s going on? Could this be related to changes in how Ubuntu 13.10 handles DNS? Or is it possible that some packages or configurations got messed up during the upgrade?

I’ve seen some forums hint at issues with resolv.conf and how it’s generated, and maybe that’s playing a part in this mess. The whole thing is just super frustrating. And it’s not just a random website or two; it’s affecting all my network activities—downloads feel sluggish, and apps that rely on internet access are acting wonky.

I’d really appreciate any tips or pointers from someone who might’ve faced a similar issue. What steps did you take to resolve this? Is there a specific fix you stumbled upon or any terminal commands I should run? I’m all ears because I’m about ready to roll back to an earlier version if it means I can get my internet back in working order! Thanks in advance for any help!

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    2 Answers






    1. DNS Resolution Issues on Ubuntu 13.10


      DNS Issues After Upgrading to Ubuntu 13.10

      Sounds super frustrating, I totally get it! It seems like you’re already on the right path with checking your DNS settings and trying out Google’s DNS servers. Here are a few things you might want to try:

      1. Check your resolv.conf

      Sometimes the resolv.conf file can get messed up after an upgrade. You can check what’s inside by running:

      cat /etc/resolv.conf

      Make sure it lists your DNS servers correctly. If it keeps changing back to something you don’t want, you might want to make it immutable temporarily:

      sudo chattr +i /etc/resolv.conf

      2. Restart Network Services

      After any changes, restart your network services. You can do this with:

      sudo service network-manager restart

      3. Use systemd-resolved

      If you’re running a newer version (or have the package installed), systemd-resolved might be causing issues. You might want to check its status:

      systemctl status systemd-resolved

      If it’s active but causing problems, you can try disabling it:

      sudo systemctl disable systemd-resolved

      4. Look for Firewall Settings

      Sometimes, firewall settings can affect DNS resolution. Check if there’s anything odd happening with ufw:

      sudo ufw status

      5. Update Your System

      Make sure everything is up to date. There might be patches or fixes released post-upgrade:

      sudo apt-get update && sudo apt-get upgrade

      6. Logs and More Troubleshooting

      Check your system logs for any hints. You can look through:

      tail -f /var/log/syslog

      If all else fails, rolling back might be the way to go, but hopefully, one of these tips will help you get things back in order without having to do that!




    2. DNS Resolution Issues in Ubuntu 13.10

      The DNS resolution issues you’re experiencing after upgrading to Ubuntu 13.10 could indeed be related to changes in how the system handles DNS configuration. One common culprit in such cases is the NetworkManager’s handling of the `resolv.conf` file, which may not be reflecting your manual DNS configurations correctly. First, ensure that you have the correct permissions and that the `resolv.conf` file is not being overwritten by NetworkManager or other services. You can try making it immutable using the command sudo chattr +i /etc/resolv.conf to prevent it from being modified. Additionally, check if the `systemd-resolved` service is running and see if disabling it helps alleviate the problem: sudo systemctl stop systemd-resolved followed by sudo systemctl disable systemd-resolved.

      If you continue to experience slowness, consider confirming whether the problem lies with DNS resolution or network performance in general. You can test your DNS resolution speed using tools like dig or nslookup: dig google.com can provide insights on response times. If all else fails, reviewing the `/etc/hosts` file for potential misconfigurations or conducting a complete DNS cache reset may provide resolution. Reverting to a different version might be an option if the issues remain unresolved, but it’s worth trying to isolate the root cause first. Leveraging community forums specific to Ubuntu can also provide additional insights specific to your configuration.


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