➜ ~ sudo docker run -t -i ubuntu /bin/bash 2014/12/08 17:00:22 Cannot connect to the Docker daemon. Is 'docker -d' running on this host?
After the installation was completed, the test official program found this error and did not find the answer for a long time.
1. try to enter doc-d
2. Found that the error changed to no permission.
3. enter sudokker-d
4. prompt for appamor if there is no software installed.
5. sudo apt-get install appamor