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The standard backup question
(lemmy.ml)
Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian provides more than a pure OS: it comes with over 59000 packages, precompiled software bundled up in a nice format for easy installation on your machine.
You mentioned rsync, then take a look rsnapshot if you haven't yet. It is based on rsync and doing incremental backup very well.