Ubuntu 16.04 - > ERROR: Couldn't connect to Docker daemon - you might need to run `docker-machine start default`

Question

I am getting error on ubuntu 16.04

\"ERROR: Couldn\'t connect to Docker daemon - you might need to run docker- machine start default. \"

Answer 1

Sometimes, this error appears if you built stack before. Reason of giving error is migh be file permissions. If in building process docker generates new files or edits some files, there will be some root owned files.

So, if the reason is permissions, make your user the owner of all application files.

$ sudo chown -R ${USER} .