Permission denied to Docker on Ubuntu

Question

Docker is installed on AWS EC2 Ubuntu 16.04 instance as follows:

docker info raises a permission denied error:

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.39/info: dial unix /var/run/docker.sock: connect: permission denied

docker -v shows:

Docker version 18.09.4, build d14af54

uname -a displays:

4.4.0-1072-aws #82-Ubuntu SMP 

sudo snap start docker cannot find 'docker'.

What's wrong here?

Answer 1

You need to add the ubuntu user to the docker group:

sudo usermod -aG docker ubuntu