Grub boot loader?

[hadi motamedi]

Dear All
On my Debian server , the '/boot/grub/menu.lst' has the right configuration
but when I reboot my Debian server I cannot enter to grub edit menu to edit
my boot kernel by pressing the 'e' key . Can you please confirm if I can
activate it through issuing the followings :
#grub-install /dev/hdax
Is it a safe procedure to try with? Please confirm.
Than you