Failed to get D-Bus connection: Operation not perm

Q: Failed to get D-Bus connection: Operation not permitted

主要是更换systemctl文件。

1、备份systemctl文件

mv /usr/bin/systemctl /usr/bin/systemctl.old

2、获取新文件

curl https://github.com/gdraheim/docker-systemctl-replacement/tree/master/files/docker/systemctl.py > /usr/bin/systemctl

3、设置可执行

chmod +x /usr/bin/systemctl

三、结果
顺利解决，截图如下：

[root@xxx xxx]# service docker start

$ sudo systemctl start docker

通过运行 hello-world 镜像来验证是否正确安装了 Docker Engine-Community 。

$ sudo docker run hello-world