仅缓存依赖包不安装nginx

apt install --download-only nginx -y

依赖包缓存路径在/var/cache/apt/archives

打包依赖包

mkdir nginx
mv /var/cache/apt/archives/*.deb nginx
tar -czvf nginxapt.tar.gz nginx

目标内网主机安装软件

tar -zxvf nginxapt.tar.gz
dpkg -i nginx/*.deb