Ubuntu 21.10 and 22.04(RC) Desktop Live (Ubuntu default) not using isolinux anymore about live-custom-ubuntu-from-scratch HOT 1 CLOSED

Using the information from [https://askubuntu.com/questions/1289400/remaster-installation-image-for-ubuntu-20-10]
After extracting the required mbr and efi (explained in the article)
I was able to remaster the default 22.04 ISO using the following command (which I could not split, xorriso didn't like that so it's a oneliner):

xorriso -as mkisofs -r -V "ubuntu-preseed" -J -joliet-long -l -iso-level 3 -partition_offset 16 --grub2-mbr "$mbr" --mbr-force-bootable -append_partition 2 0xEF "$efi" -appended_part_as_gpt -c boot.catalog -b boot/grub/i386-pc/eltorito.img -no-emul-boot -boot-load-size 4 -boot-info-table --grub2-boot-info -eltorito-alt-boot -e '--interval:appended_partition_2:all::' -no-emul-boot -o "${destination_iso}" .

This ommits symlinks:
libisofs: WARNING : Cannot add /ubuntu to Joliet tree. Symlinks can only be added to a Rock Ridge tree.
...

I hope this info is useful to incorporate/add to your excellent documentation.

from live-custom-ubuntu-from-scratch.