grubby
Tool for configuring `grub` and `zipl` bootloaders.
TLDR
Add kernel boot arguments to all kernel menu entries
$ sudo grubby --update-kernel=ALL --args '[quiet console=ttyS0]'
Remove existing arguments from the entry for the default kernel
$ sudo grubby --update-kernel=DEFAULT --remove-args [quiet]
List all kernel menu entries
$ sudo grubby --info=ALL
