参考文档：

https://ubuntu.com/tutorials/install-ubuntu-server#1-overview
https://blog.csdn.net/qq_41204568/article/details/109695308
https://blog.csdn.net/qq_42378797/article/details/110821152?spm=1001.2014.3001.5501

镜像地址：http://mirrors.aliyun.com/ubuntu-releases/
image.png

大部分都是默认配置，直接点击下一步。

设置镜像源地址，这个可以配置阿里云(http://mirrors.aliyun.com/ubuntu/)，下载加速

image.png

这里要选择安装 OpenSSh

image.png

网络配置

https://www.jianshu.com/p/d506bca9aa8d

  1. network:
  2.     ethernets:
  3.         enp3s0:  # 网卡名称
  4.             addresses: [192.168.0.20/24]  //IP址
  5.             gateway4: 192.168.0.1  // 网关
  6.             nameservers:
  7.                 addresses: [114.114.114.114, 192.168.0.1] //DNS
  8.             dhcp4: no
  9.             optional: no
  10.     version: 2

测试配置 sudo netplan try 应用配置 sudo netplan apply

cat >  /etc/netplan/00-installer-config.yaml <<EOF 
# This is the network config written by 'subiquity'
network:
  ethernets:
    ens160:
            addresses: [192.168.102.61/24]
            gateway4: 192.168.102.1
            nameservers:
                    addresses: [114.114.114.114,192.168.102.1]
            dhcp4: no
            optional: no
  version: 2
EOF

更换 apt 源 （ 20.04）

https://blog.csdn.net/u010953609/article/details/106758854/

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bakcup

cat >  /etc/apt/sources.list <<EOF 
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
EOF

Docker 安装

https://www.cnblogs.com/songxi/p/12788249.html

一、设置仓库

更新 apt 包索引

sudo apt update

安装依赖包:

sudo apt install apt-transport-https ca-certificates curl gnupg2 software-properties-common

添加阿里云证书:

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

使用阿里云的软件仓库:

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

二：安装 DOCKER ENGINE-COMMUNITY

更新 apt 包索引

$ sudo apt update

安装最新版本的 Docker Engine-Community

$ sudo apt install docker-ce

三：测试

$ sudo docker run hello-world