Hi, I’m quite new to Docker and, to get familiar with it, I have explored a few tutorial simple projects.
Unfortunately now Docker doesn’t work anymore and I find constantly the following error, even with the ‘docker pull hello-world’ command:
This error message usually occurs when the Docker daemon is unable to reach the Docker registry (registry-1.docker.io) over the network. Some possible causes of this error are:
Network connectivity issues: Make sure your system is connected to the internet and try pinging registry-1.docker.io to see if you can reach it.
Incorrect DNS configuration: Check your system’s DNS configuration to make sure it is correct. You can test your DNS resolution by running the following command:
nslookup registry-1.docker.io
Firewall blocking the connection: Make sure your firewall is not blocking the connection to the Docker registry. You can temporarily disable the firewall to see if it resolves the issue.
Outdated version of Docker: Update your version of Docker to the latest version. You can do this by following the instructions for your distribution on the Docker website.
Corrupted Docker installation: If you are still encountering the error after trying the above steps, you may have a corrupted Docker installation. In this case, you can try completely removing Docker and then reinstalling it.
Looks like /etc/resolv.conf of your host post points to a dns-server (or stub-listener) on ipv6 localhost, which seem either not existing or is blocked by a firewall.