docker：无法连接到unix：///var/run/docker.sock上的Docker守护程序。 docker守护程序是否正在运行？

Question

I installed Docker CE from the official docker site on Ubuntu server 16.04.4 LTS, Release: 16.04, Codename: xenial. I can not find the /var/lib/docker file even after I install docker on my machine. When I try to run an Ubuntu container for example with:

docker run -it ubuntu 

an error message:

docker: Can not connect to the Docker daemon at unix: ///var/run/docker.sock

Is the docker daemon running?

Answer 1

First you have to ckeck if the docker service is running service docker status

if it's not running, start it: service docker start

then you can use docker run ....

Answer 2

请尝试使用sudo： sudo docker run -it ubuntu