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Can the GRUB be set to operate like Os X, where by it only shows when specifically requested by a start up key or command before retart?

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Holding down SHIFT after your bios logo appears makes grub menu appear if it's hidden. To make it hidden you need to edit /etc/default/grub with your favourite editor and add the following or remove the # if already exists


save and quit, then run sudo update-grub
(thanks for the reminder +forespiskie)

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After changing any grub file you must update afterwards as well with sudo update-grub –  Elfy Apr 3 '12 at 19:49

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