On Tue, 8 Aug 2017 11:50:54 -0700
Rick Stevens wrote:
Note that on your next kernel upgrade, however, the "rhgb
quiet" will
reappear unless you edit the /etc/default/grub file and those bits from
the "GRUB_CMDLINE_LINUX" variable in there as well.
That hasn't been my experience. The "grubby" tool seems to just copy the
existing kernel parameters from the previous kernel in grub.cfg. I don't
believe anyone uses /etc/default/grub or runs grub2-mkconfig (other
than a user explicitly doing it manually). I suppose grubby might act
different for efi?