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I am trying to create a custom ISO particularly for 21.10 and successfully created 20.04.* iso using the attached procedure(https://gist.github.com/s3rj1k/55b10cd20f31542046018fcce32f103e) and worked fine with that procedure. When I try to create a 21.10 custom ISO, I found that there is no /isolinux folder and boot/grub/efi.img file inside the extracted/base iso, and these folder/files are not present even in 20.10, 21.04, and 21.10. can anyone help if already been implemented? These folders/files are present in 20.04.* iso's where I tried earlier.

Dushyanth
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    Ubuntu ISOs are built for multiple architectures; and effort is made to ensure all architectures boot the same **for a given release**. Ubuntu has changed the way *live* ISOs boot various times since 20.04, yet you seem to expect they'd be the same? You're working from an invalid assumption. – guiverc Feb 02 '22 at 07:12
  • I have minimal experience with this, Just I am comparing with working one and the non-working one. Please suggest a way to create a custom iso with 21.10 base iso. Don't know is there another process to create a custom iso after 20.04* releases. – Dushyanth Feb 02 '22 at 07:47
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    I would have asked this question on the github page. See the comments on the page: main comment is that you need to use an original installer. https://gist.github.com/s3rj1k/55b10cd20f31542046018fcce32f103e#comments – Rinzwind Feb 02 '22 at 08:22
  • @Rinzwind, Yes, In that link, information related to is only 20.04 LTS release, As you said, Orinial installer means base iso ?, I can't go with the base iso I have to inject my user-data file inside the iso. – Dushyanth Feb 02 '22 at 10:56
  • Probably related: https://askubuntu.com/q/1289400 – mpb Mar 19 '22 at 22:34

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