After installing docker under ubuntu, the docker service cannot be started.

  docker, question

For example, docker was installed under ubuntu. At the beginning of startup, there was insufficient permissions. Later, the user switched to root to start. It was found that no error was reported after startup, but the docker service was still not started.

I don’t know why, I hope someone can give me some advice.
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You need to check the docker daemon’s log output.

The output of different system logs is in different locations, so take a look at it.

Ubuntu (old using upstart ) - /var/log/upstart/docker.log
 Ubuntu (new using systemd ) - sudo journalctl -fu docker.service
 Amazon Linux AMI - /var/log/docker
 Boot2Docker - /var/log/docker.log
 Debian GNU/Linux - /var/log/daemon.log
 CentOS - /var/log/daemon.log | grep docker
 CoreOS - journalctl -u docker.service
 Fedora - journalctl -u docker.service
 Red Hat Enterprise Linux Server - /var/log/messages | grep docker
 OpenSuSE - journalctl -u docker.service
 OSX - ~/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/log/d‌​ocker.log
 Windows - Get-EventLog -LogName Application -Source Docker -After (Get-Date).AddMinutes(-5) | Sort-Object Time, as mentioned here.