联网主机上下载软件包并打包

首先使用一台已连接互联网的同版本ubuntu主机添加国内镜像源

mv /etc/apt/sources.list /etc/apt/sources.list.bak
vim /etc/apt/sources.list# 写入下面的内容：
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb [trusted=yes] https://packagecloud.io/fdio/release/ubuntu focal main

获取package cloud源的认证:

curl -L https://packagecloud.io/fdio/release/gpgkey | sudo apt-key add -

apt update

创建文件夹并下载依赖包:

sudo su - rootmkdir -p /root/