NuGet.Downloader allows to download all NuGet packages found in a solution, and also to push them to a specific NuGet feed.
The NuGet Downloader can be installed as a standalone .Net Core tool using the following command:
dotnet tool install -g nventive.NuGet.Downloader.Tool
Help can be found with :
nugetdownloader --help
The NuGet Downloader can also be used as part of the NvGet library