Adding kernel command line parameters when boot with GRUB2

You can add kernel boot parameter editing the file /etc/default/grub:

$ sudo vi /etc/default/grub

Just add it to variable:

GRUB_CMDLINE_LINUX_DEFAULT

Then just update GRUB:

$ sudo update-grub

Source: http://askubuntu.com/questions/19486/how-do-i-add-a-kernel-boot-parameter

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