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Possible Duplicate:
Copy OS to tmpfs from initramfs

I am putting together a new server with 64GB of RAM and I would like to copy the whole Linux OS into RAM from the disk and run the operating system solely from RAM.

How can I do this?

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marked as duplicate by RobM, Iain Feb 21 '12 at 10:17

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

you mean, like a ram disk ? -- I wouldn't bother to be honest, linux will cache into ram all the files it uses most often and is really very good at cache management. – Sirex Feb 21 '12 at 10:14

Most Live CDs have an option to 'Run from RAM'.

You can find an incomplete list at

Technically, other distributions can be made to boot from RAM as well (also referred to as "RAMboot", "toram" or "copy2ram").

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