On Mon, Feb 1, 2010 at 12:33 AM, hadi motamedi <motamedi24 at gmail.com> wrote: > > Thanks for your message . When I reboot my CentOS server I see the the menu > with a timer but I cannot enter to edit my boot kernel by pressing 'e' key . Perhaps I wasn't clear the first time. To interrupt the timer, you press the <space> bar. You can't edit anything until after that point. > Then the timer will expire and the boot process will begin . I want to be > able to edit my kernel through grub edit so I asked if I can try for > 'grub-install /dev/hdax' w/o any harm on my CentOS server . Do you mean I > can edit my '/boot/grub/menu.lst' by vi the same as I want to do inside my > grub edit ? Are they the same procedures ? Please confirm. > Yes, you can just edit the menu.lst with any text editor. /boot/grub/menu.lst is a symlink to /boot/grub/grub.conf, same as /etc/grub.conf. You have to be root to edit it (them). grub-install won't do what you want. mhr