最新的镜像安装已经整理到CSDN上，传送门：树莓派 4B 安装 Ubuntu 18.04.4 LTS （or）Ubuntu 19.10
人脸识别并不是什么高大上的东西，入门人脸识别，内容包括硬件配置，环境搭载，代码详解，程序部署，传送门：树莓派4b之初学者入门人脸识别
硬件：Raspberry Pi 4B
系统：Ubuntu 19.10 (Eoan Ermine) for IOT
官网：https://ubuntu.com/download/iot/raspberry-pi
下载通道：
Ubuntu Server 19.10 for Raspberry Pi 4 64-bit：ubuntu-19.10.1-preinstalled-server-arm64+raspi3.img.xz
Ubuntu Server 19.10 for Raspberry Pi 4 32-bit：ubuntu-19.10.1-preinstalled-server-armhf+raspi3.img.xz
配置步骤
2. 烧录至SD卡进行系统安装
3. 系统登陆
默认账号：ubuntu 默认密码：ubuntu
4. 更换镜像源
4.1 备份 apt 源文件
sudo cp -p /etc/apt/sources.list /etc/apt/sources.list.bak
如果出错的时候，需要恢复源文件的话。操作如下：
rm -rf /etc/apt/sources.list
sudo cp -p /etc/apt/sources.list.bak /etc/apt/sources.list
4.2 编辑 apt 源文件，更新为国内镜像源（注意：路径节点不是 ubuntu，而是 ubuntu-ports）
sudo nano /etc/apt/sources.list
阿里云源
deb https://mirrors.aliyun.com/ubuntu-ports/ disco main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu-ports/ disco main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu-ports/ disco-security main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu-ports/ disco-security main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu-ports/ disco-updates main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu-ports/ disco-updates main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu-ports/ disco-backports main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu-ports/ disco-backports main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu-ports/ disco-proposed main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu-ports/ disco-proposed main restricted universe multiverse
中科大源
deb https://mirrors.ustc.edu.cn/ubuntu-ports/ disco main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-ports/ disco main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu-ports/ disco-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-ports/ disco-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu-ports/ disco-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-ports/ disco-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu-ports/ disco-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-ports/ disco-security main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu-ports/ disco-proposed main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-ports/ disco-proposed main restricted universe multiverse
清华源
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ disco main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ disco main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ disco-updates main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ disco-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ disco-backports main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ disco-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ disco-security main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ disco-security main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ disco-proposed main restricted universe multiverse
deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ disco-proposed main restricted universe multiverse
5. 安装桌面环境（可选择：xubuntu-desktop、lubuntu-desktop、kubuntu-desktop）
sudo apt-get install xubuntu-desktop
6. 重启系统
reboot
7. 安装 Docker
sudo apt install docker.io
8.、安装桌面环境（可选择：gnome xubuntu-desktop、lubuntu-desktop、kubuntu-desktop）
安装最新的gnome3.34c
因为网络原因，如果提示有安装出错，请再安装一次：
sudo apt-get install gnome --fix-missing
我们也可以安装更简单的图形界面 xubuntu-desktop
sudo apt-getinstall xinint
sudo apt-getxubuntu-desktop
