I am trying to set up an automated process for installing/re-imaging some Ubuntu boxes (16.04). I am working from Automating the installation using preseeding which has a good description of how to construct the preseed file but is a bit terse when it comes to how to deploy it and I am the first to admit that my primary role is not sysadmin :)
I am doing the install over idrac from an ISO on a virtual drive. I want to preseed as much as possible which seems to imply that I should use initrd. The install instructions says
If you are using initrd preseeding, you only have to make sure a file named preseed.cfg is included in the root directory of the initrd
but I have no idea how I would do this -- do I need to alter the ISO?