add user docker code example

Example 1: make docker sudo less

$ sudo groupadd docker
$ sudo usermod -aG docker $USER
$ newgrp docker

Example 2: add user to docker group

sudo usermod -aG docker $USER   #$USER is your username

Example 3: docker post installation steps linux

# Creates docker group
sudo groupadd docker

# Add your user to the docker group
sudo usermod -aG docker $USER

# Log out and log back in so that your group membership is re-evaluated
# GNOME example
gnome-session-quit

Example 4: docker to sudoers

# my case solution
sudo setfacl -m user:$USER:rw /var/run/docker.sock

#other solution
sudo usermod -aG docker $USER

#an other solution
sudo groupadd docker
sudo gpasswd -a $USER docker
docker run hello-world