.. -*- coding: utf-8; -*-

=======

 GRUB.

=======

.. contents::

   :local:

Resore GRUB 2.

==============

If you boot to same bit-width kernel (32/64) that have installed you can chroot

to main system and recover by your Linux discto commans::

  mount /dev/sdX /mnt

  sudo mount --bind /dev /mnt/dev &&

  sudo mount --bind /dev/pts /mnt/dev/pts &&

  sudo mount --bind /proc /mnt/proc &&

  sudo mount --bind /sys /mnt/sys

  sudo chroot /mnt

  grub-install /dev/sdX

  update-grub

Check that partition with ``/boot`` directory::

  $ mount /dev/sdX /mnt

  $ ls -l /mnt/boot/grub

Setting text mode resolution on boot.

=====================================

vga=mode

Specifies the VGA text mode that should be selected when booting. mode defaults

to the VGA mode setting in the kernel image. The values are not case-sensitive.

They are:

  ask

      Prompts the user for the text mode. Pressing Enter in response to the

      prompt displays a list of the available modes. extended (or ext)

      Selects 80x50 text mode.

  normal

      Selects normal 80x25 text mode.

  number

      Uses the text mode that corresponds to number. A list of available

      modes for your video card can be obtained by booting with vga=ask and

      pressing Enter.

::

  F00 80x25

  F01 80x50

  F02 80x43

  F03 80x28

  F05 80x30

  F06 80x34

  F07 80x60

  F09 132x25

  F0A 132x43

  F0B 132x50

  F0C 132x60

  100 40x25

  154 132x43

  155 132x25

  164 132x60

  165 132x50

  120 132x25

  121 132x43

  122 132x50

  123 132x60