docker permission denied

Istiak
docker pull sundowndev/phoneinfoga:latest

That's what I tried in Terminal. I got error

WARNING: cgroup v2 is not fully supported yet, proceeding with partial confinement
Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.40/images/create?fromImage=sundowndev%2Fphoneinfoga&tag=latest: dial unix /var/run/docker.sock: connect: permission denied

I am new to docker. So, I don't know what's happening After searching little I found this and this. But, I didn't understand anything.

I was trying this and this

In this link, I was unable to understand sudo usermod -aG docker ssirohi. I didn't understand that. that's why I tried sudo usermod -aG docker Istiakshovon I got the error usermod: group 'docker' does not exist . Should I install docker group? How to do that? I have docker... I tried it also.

Istiak

After trying as he said, I reboot later since then docker is working...

$ sudo groupadd docker

$ sudo usermod -aG docker $USER

$ newgrp docker

$ docker run hello-world

$ sudo reboot now

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