Docker ejecutar sin root

Al ejecutar ciertos comandos de docker obtengo esto en consola, y es por falta de permisos.

Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.40/containers/mydatabase/json: dial unix /var/run/docker.sock: connect: permission denied

Para ejecutar docker como non rootuser debemos hacer lo siguiente

Configurar el docker group

sudo groupadd docker (1)
sudo usermod -aG docker $USER (2)
newgrp docker (3)
docker run hello-world (4)
1 Crea el docker group, quizás el output diga que ya está creado el grupo, pues no importa.
2 Añadiendo nuestro usuario al docker group.
3 Relogin en docker, estar pendiente si toca reiniciar, en caso de no funcionar.
4 Verificar si podemos ejecutar sin root el siguiente comando.
rubn ⲁƛ ▸ docker run hello-world

Hello from Docker! (1)
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/
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