在 Ubuntu 下安裝 Docker Engine - Community

1. 移除舊版

$ sudo apt-get remove docker docker-engine docker.io containerd runc

2. 設定 Docker repository

$ sudo apt-get update

$ sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg-agent \
    software-properties-common

$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

$ sudo apt-key fingerprint 0EBFCD88
    
pub   rsa4096 2017-02-22 [SCEA]
      9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid           [ unknown] Docker Release (CE deb) docker@docker.com
sub   rsa4096 2017-02-22 [S]

$ sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

3. 安裝 Docker Engine - Community

$ sudo apt-get update

$ sudo apt-get install docker-ce docker-ce-cli containerd.io

4. 設定權限

$ sudo usermod -aG docker ${USER}

5. 檢查是否順利安裝完成

$ docker run hello-world

參考文章

Get Docker Engine - Community for Ubuntu

How to fix docker: Got permission denied while trying to connect to the Docker daemon socket