DNS errors can be a significant hindrance when you’re trying to browse the web. They can occur due to various reasons, including incorrect DNS settings, network configuration issues, or problems with your router. In this article, we’ll guide you through some solutions to fix DNS errors in Ubuntu for Chrome and Firefox.
Understanding DNS Errors
Before we delve into the solutions, let’s understand what DNS errors are. DNS, or Domain Name System, is like the phonebook of the internet. It translates human-friendly website names into IP addresses that computers use to communicate. When your browser can’t connect to the DNS server or the server can’t resolve the website’s IP address, you encounter a DNS error.
Flushing DNS Cache
The first step in troubleshooting DNS errors is to flush your DNS cache. This action discards all the information stored in the cache, forcing your computer to find new DNS information.
To flush the DNS cache in Ubuntu, open your terminal and run the following command:
sudo systemd-resolve --flush-caches
--flush-caches parameter tells the
systemd-resolve command to clear the caches.
Checking Network Configuration
Incorrect network configuration can sometimes lead to DNS errors. To check your network configuration, open the
/etc/network/interfaces file. This file should contain the following lines:
iface lo inet loopback
lo stands for ‘loopback’, a special network interface that your computer uses to communicate with itself.
Verifying NetworkManager Configuration
NetworkManager is a utility for managing network connections. If it’s incorrectly configured, it could cause DNS errors. To check its configuration, open the
/etc/NetworkManager/NetworkManager.conf file and make sure the
dns=dnsmasq line is commented out (with a
# at the beginning).
Checking DNS Server Settings
If the DNS server settings are incorrect, your browser won’t be able to resolve website names. To check these settings, open the
/etc/resolv.conf file and add the following lines:
These lines set Google’s DNS servers (188.8.131.52 and 184.108.40.206) as your DNS servers. After making these changes, restart the network service with the following command:
sudo service network-manager restart
Checking Router DNS Settings
If the issue persists, it could be due to your router’s DNS settings. Access your router’s admin panel (the URL should be in your router’s manual) and set the primary DNS to
220.127.116.11 and the secondary DNS to
Restarting the Router
Sometimes, simply restarting your router can solve DNS errors. To do this, unplug your router, wait for a few minutes, and then plug it back in.
DNS errors can be frustrating, but they’re usually easy to fix. By following the steps outlined in this article, you should be able to resolve most DNS errors in Ubuntu for Chrome and Firefox. If you’re still encountering issues, consider seeking further assistance from Ubuntu support forums or contacting your internet service provider.
To flush the DNS cache in Ubuntu, open your terminal and run the command
sudo systemd-resolve --flush-caches.
DNS, or Domain Name System, is like the phonebook of the internet. It translates human-friendly website names into IP addresses that computers use to communicate. It matters because without DNS, your browser wouldn’t be able to find the correct IP address for the websites you want to visit.
To check your network configuration in Ubuntu, open the
/etc/network/interfaces file. It should contain the lines
auto lo and
iface lo inet loopback which define the loopback network interface.
NetworkManager is a utility for managing network connections in Ubuntu. It is important because incorrect configuration of NetworkManager can lead to DNS errors. It is responsible for handling network settings and connections.
To check the DNS server settings in Ubuntu, open the
/etc/resolv.conf file. You can add the lines
nameserver 18.104.22.168 and
nameserver 22.214.171.124 to set Google’s DNS servers as your DNS servers.
To restart the network service in Ubuntu, use the command
sudo service network-manager restart. This will apply any changes made to the network configuration.
To access your router’s admin panel, you can enter the router’s IP address in a web browser. The specific IP address and login credentials can usually be found in the router’s manual or on the back of the router itself.
Restarting your router can help resolve DNS errors as it clears any temporary issues or conflicts that may be affecting the router’s performance. It allows the router to start fresh and establish a new connection to your internet service provider.
If you’re still encountering DNS errors after trying the solutions mentioned, consider seeking further assistance from Ubuntu support forums or contacting your internet service provider. They may be able to provide additional troubleshooting steps or help resolve any underlying network issues.