APT (Advanced Packaging Tool) is the standard software package management system for Debian and its derivatives.

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how to work around APT's “Release file expired” problem on a local mirror

I have a local mirror (created with debmirror), and when I try to do a cache update (apt-get update) after a few days, I get this: E: Release file expired, ignoring ...
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What is the real difference between “apt-get” and “aptitude”? (How about “wajig”?)

I know that both apt-get and aptitude are command line package management interfaces on Debian derived Linux, with different options, but I'm still somewhat confused. Under the hood, aren't they ...
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apt-get or aptitude [duplicate]

Possible Duplicate: What is the real difference between “apt-get” and “aptitude”? (How about “wajig”?) I'm new in Linux (Ubuntu) world. When I need to ...
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Is it possible to simulate installation of Debian packages, still marking them installed?

Here's what I would like. Start with a virtual system with no installed packages. Then I invoke a tool similar to apt-get to ask it to compute the dependencies and mark all the packages that would be ...