[jetson]jetpack5.0.2的ubuntu20.04更换为清华源

测试环境：

Software part of jetson-stats 4.1.5 - (c) 2023, Raffaello Bonghi Model: NVIDIA Jetson Xavier NX Developer Kit - Jetpack 5.0.2 GA [L4T 35.1.0] NV Power Mode: MODE_20W_6CORE - Type: 8 jtop:  - Version: 4.1.5  - Service: Active Libraries:  - CUDA: 11.4.239  - cuDNN: 8.4.1.50  - TensorRT: 8.4.1.5  - VPI: 2.1.6  - Vulkan: 1.3.203  - OpenCV: 4.5.4 - with CUDA: NO  

jetson更换成清华源，也可以更换成阿里源/中科大等常用源，注意jepack5.02对于的是ubuntu20.04版本所以是focal而不是bionic（对应ubuntu18.04）。其中为了安装旧的libpng12需要加入xenial （ubuntu16.04）的源

备份文件：

sudo cp /etc/apt/source.list /etc/apt/source.list.bak

加入清华源：

sudo vi /etc/apt/source.list

   deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-updates main restricted universe multiverse    deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-updates main restricted universe multiverse    deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-security main restricted universe multiverse    deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-security main restricted universe multiverse    deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-backports main restricted universe multiverse    deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal-backports main restricted universe multiverse    deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal main universe restricted    deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ focal main universe restricted    deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ xenial main multiverse restricted universe

保存后：

sudo apt update

sudo apt upgrade

参考文章：Jetson Xavier NX刷机安装Ubuntu20.04，配置CUDA，cuDNN，Pytorch等环境教程（英伟达官方源安装，理论适用其它Jetson设备）_jetson nx 刷机_南城落叶的博客-CSDN博客