All Linux distributions with a GNU userland
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It is a Unix clone.
Uses the same userland as other GNU variants.
Pro Many different desktops to choose
Just use whatever you want. Some are lightweight, others are full of extravagant features. There is a flavor for each taste.
It's only a clone and some things work differently.
Con Many Distributions
there are just too many of them to know.
Con No graphical Interface
Linux does not come with a graphical interface by default.