Docker 無法啟動 Failed to start LSB: Create lightweight, portable, self-sufficient containers.

解決辦法執行以下命令：

wget -qO- https://get.docker.com/ | sh

Docker安裝完啟動時提示Failed to start docker.service: Unit docker.service is masked.

解決辦法是按照順序執行以下三條命令：

systemctl unmask docker.service
systemctl unmask docker.socket
systemctl start docker.service