Docker: Temporary failure resolving 'deb.debian.org'

Specifying a DNS server for docker containers helped me.

Create a /etc/docker/daemon.json file with this content:

{
  "dns": ["8.8.8.8", "8.8.4.4"]
}

and restart the docker service:

sudo service docker restart

src: https://docs.docker.com/engine/install/linux-postinstall/#specify-dns-servers-for-docker

Try restarting docker. Worked for me.

sudo service docker restart or sudo /etc/init.d/docker restart

Prior to bumping into this issue, docker was working fine. If you never had docker working in the first place, you probably have a different issue.

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