How to run Ubuntu fully in initramfs?

Posted by miernik on Ask Ubuntu See other posts from Ask Ubuntu or by miernik
Published on 2010-11-04T12:59:39Z Indexed on 2010/12/31 10:59 UTC
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boot

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ram-usage

I have a machine with 10 GB of RAM, and I would like to run Ubuntu on it (Debian also OK if its easier), fully in RAM in such a way: I boot from a compressed image on an USB flash disk, that is uncompressed into RAM, and then I can remove the disk from the USB slot, and use the system only with RAM, without any permanent disk.

Whenever I make any changes that I want permanent, I would put the flash disk back into the USB slot (possibly not the same one as I used initially to boot, as I would like to keep many versions of the boot flash disk), and run some command that would save the current state into a compressed image on the disk.

How can I set this up?

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