How to properly install docker on ubuntu 14.04?

Question

ubuntu

I'm trying to install docker on ubuntu according to the manual from the docker site https://docs.docker.com/v1.6/installation/ubuntulinux/
during the installation process I get an error

FATA[0000] Get http:///var/run/docker.sock/v1.18/info: dial unix /var/run/docker.sock: no such file or directory. Are you trying to connect to a TLS-enabled daemon without TLS?

I get the same error after installation if I try, for example, to execute
sudo docker info

Answer 1

I'll answer my own question. The above error appeared because the docker daemon itself was not started. And the daemon didn't start due to conflicts with the remnants of AppArmor, which was incorrectly removed from my system. Everything was solved by reinstalling AppArmor