Say you have a batch of old floppies or hard drives with files of indeterminate age and quality. How do you tell what is good, bad or generally bitrotted.

The article would focus on verifying the condition of various file types using open source tools. The types include compressed files (gzip, bzip2, gz, etc.), document formats (.docx, pdf, epub, etc.), and image formats (gif, jpeg, etc.). The tools will be in Fedora for the most part. There may be a few obscure formats that will need special tools (like ace, zoo, etc.).