Ubuntu上的安装Docker

1. 更新系统里的所有能更新的软件，更新apt软件包索引并安装软件包，以允许apt通过HTTPS使用存储库 

lizhichao@chaochao:~$ sudo apt-get update
lizhichao@chaochao:~$ sudo apt-get install
>     apt-transport-https
>     ca-certificates
>     curl
>     gnupg
>     lsb-release

2. 添加Docker的官方GPG密钥

lizhichao@chaochao:~$ curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg –dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

3.lizhichao@chaochao:~$ echo
    >   “deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu
    >   $(lsb_release -cs) stable” | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

4. 更新apt软件包索引，并安装最新版本的Docker Engine和containerd，或转至下一步安装特定版本
 lizhichao@chaochao:~$ sudo apt-get update
lizhichao@chaochao:~$  sudo apt-get install docker-ce docker-ce-cli containerd.io

5. 要安装特定版本的Docker Engine

lizhichao@chaochao:~$ systemctl start docker
==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
Authentication is required to start ‘docker.service’.
Authenticating as: repchaochao (lizhichao)
Password: 
==== AUTHENTICATION COMPLETE ===
lizhichao@chaochao:~$ sudo docker run hello-world