Ubuntu 19.04 安装docker

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配置国内源： deb https://mirrors.ustc.edu.cn/ubuntu/ disco main restricted universe multiverse deb https://mirrors.ustc.edu.cn/ubuntu/ disco-updates main restricted universe multiverse deb https://mirrors.ustc.edu.cn/ubuntu/ disco-backports main restricted universe multiverse deb https://mirrors.ustc.edu.cn/ubuntu/ disco-security main restricted universe multiverse deb https://mirrors.ustc.edu.cn/ubuntu/ disco-proposed main restricted universe multiverse deb [arch=amd64] http://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu disco stable   sudo apt-get update sudo apt-get install \     apt-transport-https \     ca-certificates \     curl \     software-properties-common   curl -fsSL http://mirrors.ustc.edu.cn/docker-ce/linux/ubuntu/gpg | sudo apt-key add - sudo apt-get update sudo apt-get install docker-ce