干净安装后无法连接到Docker守护进程

我试着在我的Ubuntu14.04上安装Docker。安装之后,我有一些问题,您可以在这里阅读: docker installation issue file not found after installation

安装现在已经完成,但当我运行时 docker ps -a 我得到这个错误:

Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?

我想没问题,我开始吧。所以我跑了 /etc/init.d/docker start

没有改变。在这种情况下,问题是什么?

提前谢谢

更新

船坞锁SAIS

time="2019-01-15T16:04:48.442161704Z" level=error msg="'overlay' not found as a supported filesystem on this host. Please ensure kernel is new enough and has overlay support loaded." storage-driver=overlay2
time="2019-01-15T16:04:48.443237115Z" level=error msg="AUFS was not found in /proc/filesystems" storage-driver=aufs
time="2019-01-15T16:04:48.444209277Z" level=error msg="'overlay' not found as a supported filesystem on this host. Please ensure kernel is new enough and has overlay support loaded." storage-driver=overlay
time="2019-01-15T16:04:48.448467742Z" level=info msg="Graph migration to content-addressability took 0.00 seconds"
time="2019-01-15T16:04:48.451222266Z" level=warning msg="Your kernel does not support oom control"
time="2019-01-15T16:04:48.451238804Z" level=warning msg="Your kernel does not support memory swappiness"
time="2019-01-15T16:04:48.451249423Z" level=warning msg="Your kernel does not support kernel memory limit"
time="2019-01-15T16:04:48.451255189Z" level=warning msg="Unable to find cpu cgroup in mounts"
time="2019-01-15T16:04:48.451287772Z" level=warning msg="Unable to find cpuset cgroup in mounts"
time="2019-01-15T16:04:48.451337670Z" level=warning msg="mountpoint for pids not found"
Error starting daemon: Devices cgroup isn't mounted