问题如上
ERROR: Couldn't connect to Docker daemon at http+docker://localhost - is it running?
If it's at a non-standard location, specify the URL with the DOCKER_HOST environment variable.
先查看docker info看看哪儿出错了可以看到是权限问题
解决办法这里要注意一点
修改之后记得推出终端，或者登出登入用户来更新
然后就可以使用了e