'Starting Shadowbox .......................... FAILED'的解决方法

有时, 电脑会提示如下错误

Starting Shadowbox .......................... FAILED
docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.
See 'docker run --help'.
Sorry! Something went wrong. If you can't figure this out, please copy and paste all this output into the Outline Manager screen, and send it to us, to see if we can help you.

依次运行如下指令可能解决

yum update -y

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

yum install dnf

sudo dnf install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/containerd.io-1.2.6-3.3.el7.x86_64.rpm

dnf --disablerepo=AppStream install docker-ce

systemctl enable docker.service

sudo systemctl start docker

以上, 曾实例化于centos7