Troubleshooting of docker errors

Troubleshooting of docker errors

Error response from daemon: dial unix docker.raw.sock: connect: connection refused (on Mac)

Error condition: After I inputed the command docker ps, I met the error message as follows:

Error response from daemon: dial unix docker.raw.sock: connect: connection refused

Solution: Make sure the docker is running. After docker was lunched, the result of command docker ps should be:

CONTAINER ID   IMAGE     COMMAND   CREATED   STATUS    PORTS     NAMES

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