I asked:
I want to delete "rhgb" and "quiet" on the boot line, preferably in both places [/etc/default/grub and /boot/grub2/grub.cfg]. Is there any way to do that through kickstart or do I have to use a post-install step?
Joe Wulf replied:
I think your cleanest way would be a simple one-liner post-install sed command.
Surely changing /etc/default/grub is just a one-line sed command. But then I would need to run grub-mkconfig. Since the post-install script runs under chroot, it's not clear to me that it would work. I'm not eager to apply sed to /boot/grub2/grub.cfg, though I suppose I could.