Ubuntu Autoinstall ISO

This repository helps to create an automatic installation ISO for Ubuntu according to Dr. Donald Kinghorn's excellent guide on Puget Systems.

You need to have the following tools installed:

• wget
• 7z
• xorriso

Copy the file user-data.yml.example and adapt it to your needs:

cp user-data.yml.example user-data.yml

You can create a password using mkpasswd, e.g.

mkpasswd --method=SHA-512 --rounds=500000

If you want to generate SSH keys, I recommend you to use

ssh-keygen -t ed25519 -f key -C infra

The default Ubuntu image is Ubuntu Server 22.04 (Jammy). You can also use another Ubuntu image by adapting the variable image_filename in the script build.sh.

After that just run

./build.sh

It will download the ISO, put its contents to the directory output, move the boot images to the folder BOOT, copy the user data file to a server subdirectory and create the new ISO file.

More information:

• Autoinstall configuration reference manual
• cloud-init Module reference