Here is the situation. In Synaptic Package Manager, suppose I want to download package files of package_name. I follow following steps: Select package_name> Mark for installation > Accept additional needed package installation dialogue (if any) > Apply. Then a prompt shows me which package will be installed, upgraded and removed. There is also a checkbox "Download Only". I tick it and click OK. Then it finishes downloading packages after a few minutes. My question is, where do the downloaded package goes?