Downloading packages: containerd.io-1.4.1-3.1.el7.x8 FAILED https://download.docker.com/linux/centos/7/x86_64/nightly/Packages/containerd.io-1.4.1-3.1.el7.x86_64.rpm: [Errno 14] curl#35 - "Network file descriptor is not connected" Trying other mirror.
安装docker报错 ，最后解决办法
1、yum clean all 2、yum makecache
再重新安装就好了
安装方法见官网链接
https://docs.docker.com/engine/install/centos/
