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Description of problem:
When using grubby to add arguments to the kernel, for either lilo or grub, I am
only able to add one instance of an item.
My specific problem is that for a serial console, if you want to have the output
go through both the video and serial console, you need to add

console=tty0 console=ttyS0,9600n8

(ok, so you need to modify the serial part for your specific instance but that's
not the problem)

grubby will only allow one instance of console= so I'm having some trouble using
grubby to do this.



Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.Try adding them one at a time
grubby --config-file=/boot/grub/grub.conf --update-kernel=0 --args="console=tty0"
and then do
grubby --config-file=/boot/grub/grub.conf --update-kernel=0
--args="console=ttyS0,9600n8"
2. Or try adding them both at the same time
grubby --config-file=/boot/grub/grub.conf --update-kernel=0 --args="console=tty0
console=ttyS0,9600n8"

Actual Results:  1. It replaces console=tty0 with console=ttyS0,9600n8

2. It only does the first console= and not the second one as well.

Expected Results:  1. Well, actually that is sortof what I expect.  But it would
be nice if there was some way to add it when doing it the second time, like
--argsadd or something.

2. This situation is the one that supprised me.  I though that if I put both
sections in the quotations, that it would add them both.

Additional info: