Error unable to resolve host docker

Question

I used the command curl -fsSL https://download.docker.com/linux/ubuntu/pgp | sudo apt-key add –

I’m getting an error that says “unable to resolve host docker”

Can someone help?

Answer 1

This error occurs because its not a fully qualified dominium, machine has no dns setup coz it’s a local machine.

You can resolve this using two ways

1. Edit the /etc/resolv.conf from the host in order to use external dns.
2. Run docker with -dns option.