Over the last month, an odd issue tripped up Linux distributions that use apt-get for updating and upgrading. Upon issuing the command sudo apt-get update, the process would stall when connecting with any of the default repositories or slow to a crawl when downloading headers during the update process.
After much troubleshooting and chasing down the wrong rabbit holes (such as DNS, cache, and gateway issues), I finally discovered the problem. You may be surprised at the solution.
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