docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

Question

Hi I installed docker on my ubuntu 14.xx

and whenever I run docker commands, it throws the same error

docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.

docker run hello-world docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?. See 'docker run --help'.

How can I solve this problem? Thank you so much in advance

Solution

you can try sudo systemctl start docker or sudo service docker start in order to start the docker daemon, if it's already running type sudo systemctl status docker or sudo service docker status to see if there are some errors.

Regards.

Comments

[BangolPhoenix]

thanks! It shows mount: permission denied rmdir : fail to remove 'cpu'

[W4nn4Die]

@BangolPhoenix i guess your user was inside sudo group, or you tried with the root user. This seems to be a very strange error for me, your ubuntu is in a virtual environment? are you able to upgrade to a higher version of ubuntu? what version of docker do you have installed?

[BangolPhoenix]

Turned out that my online IDE service was a docker itself!! you were right about the guess when u said it's super strange. They told me it's impossible to install docker cuz its inside of a docker env(though I think I heard there's a way to do that maybe that won't work with this IDE