[Docker] Installation steps and problems encountered

installation steps

Reference: How to install Docker on Ubuntu Linux and how to use it

problem

docker version

When I entered the above command, the following error occurred:
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/version: dial unix /var/run/docker.sock: connect: permission denied

Solution

sudo chmod 777 /var/run/docker.sock

Reference: [Solution] docker: permission denied