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Created October 30, 2022 05:35
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building_live_ubuntu_cd_with_rt.md

Create a live ubuntu cd with PREEMPT_RT

Based on: https://askubuntu.com/a/741770

I compiled the kernel with PREEMPT_RT previously (notes here: ). Then I extracted the .deb files following these instructions: https://askubuntu.com/questions/1340273/is-there-any-way-to-extract-content-of-vdi-file (As the shared folder from Virtualbox did not work for me).

Install Cubic

sudo apt-add-repository ppa:cubic-wizard/release
sudo apt install cubic

Follow the prompts, choose a folder to work on, choose the ISO to base it on...

and you'll be dropped in a virtual environment (chroot) inside of the image.

Copy files (rt .deb files) by dragging them into the terminal window.

Install them with dpkg -i *.deb.

Click next, edit the fields on image name and so on (I added "RT"), go next, check the compression type (I left it at gzip after failing with lzma).

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