Read version and distro?

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Autor: plug-discuss@lists.PLUG.phoenix.az.us
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Assunto: Read version and distro?
Is there a command(s) or perhaps a file to read that will tell what kernel and distro verison a Linux box is running? A string that says "RedHat X.X Linux 2.x" or something like that. Or maybe the info comes from two different places. Whatever. How do I get that?

Alan