多系统 grub之ubuntu的 grub

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"
if [ ${prev_saved_entry} ]; then
  set saved_entry=${prev_saved_entry}
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z ${boot_once} ]; then
    saved_entry=${chosen}
    save_env saved_entry
  fi
}

function recordfail {
  set recordfail=1
  if [ -n ${have_grubenv} ]; then if [ -z ${boot_once} ]; then save_env recordfail; fi; fi
}
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 2fb32aa9-6a67-481f-8398-f2cdd1102366
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  insmod gfxterm
  insmod vbe
  if terminal_output gfxterm ; then true ; else
    # For backward compatibility with versions of terminal.mod that don't
    # understand terminal_output
    terminal gfxterm
  fi
fi
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 2fb32aa9-6a67-481f-8398-f2cdd1102366
set locale_dir=($root)/boot/grub/locale
set lang=zh
insmod gettext
if [ ${recordfail} = 1 ]; then
  set timeout=-1
else
  set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###

menuentry 'Ubuntu，Linux 2.6.32-21-generic' --class ubuntu --class gnu-linux --class gnu --class os {
    recordfail
    insmod ext2
    set root='(hd0,8)'
    search --no-floppy --fs-uuid --set 2fb32aa9-6a67-481f-8398-f2cdd1102366
    linux    /boot/vmlinuz-2.6.32-21-generic root=UUID=2fb32aa9-6a67-481f-8398-f2cdd1102366 ro   quiet splash
    initrd    /boot/initrd.img-2.6.32-21-generic
}

menuentry "Microsoft Windows XP Professional (on /dev/sda3)" {
    set root='(hd0,3)'
    chainloader +1
}

menuentry 'Red hat 5.5 (on /dev/sda2)' {
         set root='(hd0,2)'
         linux   /vmlinuz-2.6.18-194.el5 ro root=/dev/sda2    quiet
         initrd  /initrd-2.6.18-194.el5.img
 }

#注意：因为red hat 的 / 在/dev/hda2 下，所以需要把 initrd-2.6.18-194.el5.img 和 vmlinuz-2.6.18-194.el5拷贝到 /下