I did this once, but I can't find instructions how to do that again. It was probably kernel option that make live cd save in ram.

I have old Xubuntu but want to install nested version of Xubuntu, I've downloaded the iso on my old laptop but it have broken DVD, so how can I run live CD, of old Xubuntu, put it in RAM so I can put empty DVD and then burn new Xubuntu?

  • This is kind of off topic and you have all the answers you need in your old question: askubuntu.com/questions/295407/how-to-burn-801mb-iso-file
    – user692175
    Aug 11, 2017 at 15:36
  • 1
    @MichaelBay this is completly different question, I don't want to burn larger CD 801MB on CD but burn it when live CD is booted, where you can't remove CD/DVD from drive.
    – jcubic
    Aug 11, 2017 at 15:39
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    ⁺¹, it's a useful question. I remember having alike problem with the only working CD-ROM in old notebook without HDD, so I had to boot from a live-cd, and to burn using the same CD-ROM where I booted from. I had to make a lot of tricks to do it; don't remember the details though.
    – Hi-Angel
    Aug 11, 2017 at 17:46

1 Answer 1


Found it in the ubuntu wiki page https://wiki.ubuntu.com/BootToRAM

Basically you need to edit kernel options from your liveCD while it's booting. While grub2 is loading, you should be able to use e and add option to the kernel toram.


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