How to solve “Cannot find a valid baseurl for repo” in CentOS

A common issue faced by CentOS users, notably when utilizing the YUM package manager, is encountering the error message “Cannot find a valid baseurl for repo: base/7/x86_64”.

This problem often arises on freshly installed systems. In this brief article, we will guide you on resolving the “cannot find a valid baseurl for repo” error in the CentOS Linux distribution.

The screenshot below displays the encountered error following the execution of the `yum update` command:

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The occurrence of this error can typically be attributed to either network issues or the base URL being commented out in the repository configuration file. To resolve this, consider the following solutions:

a – Check Network Connectivity:

  • Ensure that your system has a stable and active network connection. Test network connectivity by pinging external servers or websites:
  • ping
  • If this is unsuccessful, the ping results reveal either a DNS problem or no Internet connectivity, you can take the following steps:

Identify Network Interface:

  • Run the following command to determine your network interface:
  • ip a
  • Look for the interface associated with your network connection. It’s often labeled as ‘enp0s3’ or similar.
  • Now, use the nano command to edit the configuration file for interface enp0s3, .i.e. /etc/sysconfig/network-scripts/ifcfg-enp0s3.
  • nano /etc/sysconfig/network-scripts/ifcfg-enp0s

To fix a DNS problem, you need to update the Nameservers in the configuration file. Follow these steps:


Use Google’s public DNS servers ( and as an example, or replace them with the IP addresses of your preferred DNS servers.

The next step is to restart the Network Manager service. You can do this by using the systemctl command.

systemctl restart NetworkManager

Now check if the Error above is gone by running the yum update command.

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b – Repo configuration file

The problem might be with the repo configuration file /etc/yum.repos.d/CentOS-Base.repo if the system has Internet access and DNS is functioning properly.

Open the file /etc/yum.repos.d/CentOS-Base.repo :

nano /etc/yum.repos.d/CentOS-Base.repo

Find the [base] section in the file. You need to activate the baseurl by deleting the # sign at the beginning of the line.

Finally, save the file and exit. Now try to invoke the yum update command again.

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Nikolaus Oosterhof

Nikolaus holds a degree in software development and has a strong passion for all things tech-related, especially gadgets with screens. Though he is nostalgic for older phone models, he's a retired gamer and continues to enjoy programming in open-source environments. Additionally, Nikolaus enjoys writing about Linux, macOS and Windows and has experience designing web pages.

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