How do I disable the first boot startup scripts?

[lunasophia]

I have booted the board many, many times while testing things and would like to disable the first boot startup scripts. It seems they're part of the initramfs machinery, but I'd like to be sure before I start making changes so I don't break anything. Some guidance would be appreciated! It'd be great to have this in the official documentation.

[CounterPillow]

Disabling the resize root hook should be as easy as sudo chmod -x /etc/initramfs-tools/hooks/resizerootfs && sudo update-initramfs -u but I'll have to double check that before I put it in the documentation.

The openssh key generation is a systemd unit that only runs if the host keys are missing, so that doesn't need to be disabled since it won't run.