#備份
cp /etc/apt/sources.list /etc/apt/sources.list.bak

#添加阿里源
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

##更新
sudo apt-get update

中科大源

##中科大源
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-security main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse

163源

##163源
deb http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ bionic-backports main restricted universe multiverse

清華源

##清華源
deb https://mirrors.tuna./ubuntu/ bionic main restricted universe multiverse
deb-src https://mirrors.tuna./ubuntu/ bionic main restricted universe multiverse
deb https://mirrors.tuna./ubuntu/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.tuna./ubuntu/ bionic-updates main restricted universe multiverse
deb https://mirrors.tuna./ubuntu/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.tuna./ubuntu/ bionic-backports main restricted universe multiverse
deb https://mirrors.tuna./ubuntu/ bionic-security main restricted universe multiverse
deb-src https://mirrors.tuna./ubuntu/ bionic-security main restricted universe multiverse
deb https://mirrors.tuna./ubuntu/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.tuna./ubuntu/ bionic-proposed main restricted universe multiverse

Jetson設(shè)備更換apt源
接下來進(jìn)入官方教程沒有的部分
Jetson設(shè)備默認(rèn)的apt鏡像源在海外，速度你懂的，所以需要用國內(nèi)的源代替海外源
如果你以為百度下“Linux換源”就解決了，恭喜，坑來了，Jetson處理器是aarch64類型的，常用的arm64換源教程都不能用！
要使用與之匹配的源，國內(nèi)aarch64的源有的連不上，有的包無法安裝，好多網(wǎng)上Jetson Nano的換源教程都用不了，我試了幾個，下面的這個清華大學(xué)的源完美可用，附教程：
1.先備份原本的source.list文件
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak  
2.修改source
進(jìn)入source.list
sudo gedit /etc/apt/sources.list
按"i"開始輸入，然后刪除所有內(nèi)容，復(fù)制進(jìn)下面的
deb http://mirrors.tuna./ubuntu-ports/ bionic main multiverse restricted universe
deb http://mirrors.tuna./ubuntu-ports/ bionic-security main multiverse restricted universe
deb http://mirrors.tuna./ubuntu-ports/ bionic-updates main multiverse restricted universe
deb http://mirrors.tuna./ubuntu-ports/ bionic-backports main multiverse restricted universe
deb-src http://mirrors.tuna./ubuntu-ports/ bionic main multiverse restricted universe
deb-src http://mirrors.tuna./ubuntu-ports/ bionic-security main multiverse restricted universe
deb-src http://mirrors.tuna./ubuntu-ports/ bionic-updates main multiverse restricted universe
deb-src http://mirrors.tuna./ubuntu-ports/ bionic-backports main multiverse restricted universe
“Esc”結(jié)束輸入，“:wq!”保存退出
3.更新軟件列表，保存在本地
sudo apt-get update
如果需要，可以更新軟件：
sudo apt-get upgrade
Enjoy~