ubuntu的grub.cfg

m睡意zzz 发布于 2017/03/07 16:08
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grub.cfg中存放的是系统的引导文件。我发现/boot/efi/EFI/ubuntu也存在一个grub.cfg(另一个在/boot/grub/grub.cfg)。

/boot/grub/grub.cfg

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

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="2"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

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
}
function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_gpt
insmod ext2
set root='hd0,gpt9'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt9 --hint-efi=hd0,gpt9 --hint-baremetal=ahci0,gpt9  531e6168-64f8-46e5-8eca-8cb29bfacbed
else
  search --no-floppy --fs-uuid --set=root 531e6168-64f8-46e5-8eca-8cb29bfacbed
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=zh_CN
  insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
  set timeout=30
else
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=15
  # Fallback normal timeout code in case the timeout_style feature is
  # unavailable.
  else
    set timeout=15
  fi
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
if background_color 44,0,30,0; then
  clear
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
function gfxmode {
    set gfxpayload="${1}"
    if [ "${1}" = "keep" ]; then
        set vt_handoff=vt.handoff=7
    else
        set vt_handoff=
    fi
}
if [ "${recordfail}" != 1 ]; then
  if [ -e ${prefix}/gfxblacklist.txt ]; then
    if hwmatch ${prefix}/gfxblacklist.txt 3; then
      if [ ${match} = 0 ]; then
        set linux_gfx_mode=keep
      else
        set linux_gfx_mode=text
      fi
    else
      set linux_gfx_mode=text
    fi
  else
    set linux_gfx_mode=keep
  fi
else
  set linux_gfx_mode=text
fi
export linux_gfx_mode
menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-531e6168-64f8-46e5-8eca-8cb29bfacbed' {
    recordfail
    load_video
    gfxmode $linux_gfx_mode
    insmod gzio
    if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
    insmod part_gpt
    insmod ext2
    set root='hd0,gpt7'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt7 --hint-efi=hd0,gpt7 --hint-baremetal=ahci0,gpt7  e1f428f6-2e90-43b3-8f3e-ea79d3d45a6f
    else
      search --no-floppy --fs-uuid --set=root e1f428f6-2e90-43b3-8f3e-ea79d3d45a6f
    fi
    linux    /vmlinuz-4.4.0-21-generic.efi.signed root=UUID=531e6168-64f8-46e5-8eca-8cb29bfacbed ro  quiet splash $vt_handoff
    initrd    /initrd.img-4.4.0-21-generic
}
submenu 'Ubuntu 高级选项' $menuentry_id_option 'gnulinux-advanced-531e6168-64f8-46e5-8eca-8cb29bfacbed' {
    menuentry 'Ubuntu,Linux 4.4.0-21-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-21-generic-advanced-531e6168-64f8-46e5-8eca-8cb29bfacbed' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt7'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt7 --hint-efi=hd0,gpt7 --hint-baremetal=ahci0,gpt7  e1f428f6-2e90-43b3-8f3e-ea79d3d45a6f
        else
          search --no-floppy --fs-uuid --set=root e1f428f6-2e90-43b3-8f3e-ea79d3d45a6f
        fi
        echo    '载入 Linux 4.4.0-21-generic ...'
        linux    /vmlinuz-4.4.0-21-generic.efi.signed root=UUID=531e6168-64f8-46e5-8eca-8cb29bfacbed ro  quiet splash $vt_handoff
        echo    '载入初始化内存盘...'
        initrd    /initrd.img-4.4.0-21-generic
    }
    menuentry 'Ubuntu, with Linux 4.4.0-21-generic (upstart)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-21-generic-init-upstart-531e6168-64f8-46e5-8eca-8cb29bfacbed' {
        recordfail
        load_video
        gfxmode $linux_gfx_mode
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt7'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt7 --hint-efi=hd0,gpt7 --hint-baremetal=ahci0,gpt7  e1f428f6-2e90-43b3-8f3e-ea79d3d45a6f
        else
          search --no-floppy --fs-uuid --set=root e1f428f6-2e90-43b3-8f3e-ea79d3d45a6f
        fi
        echo    '载入 Linux 4.4.0-21-generic ...'
        linux    /vmlinuz-4.4.0-21-generic.efi.signed root=UUID=531e6168-64f8-46e5-8eca-8cb29bfacbed ro  quiet splash $vt_handoff init=/sbin/upstart
        echo    '载入初始化内存盘...'
        initrd    /initrd.img-4.4.0-21-generic
    }
    menuentry 'Ubuntu, with Linux 4.4.0-21-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.4.0-21-generic-recovery-531e6168-64f8-46e5-8eca-8cb29bfacbed' {
        recordfail
        load_video
        insmod gzio
        if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt7'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt7 --hint-efi=hd0,gpt7 --hint-baremetal=ahci0,gpt7  e1f428f6-2e90-43b3-8f3e-ea79d3d45a6f
        else
          search --no-floppy --fs-uuid --set=root e1f428f6-2e90-43b3-8f3e-ea79d3d45a6f
        fi
        echo    '载入 Linux 4.4.0-21-generic ...'
        linux    /vmlinuz-4.4.0-21-generic.efi.signed root=UUID=531e6168-64f8-46e5-8eca-8cb29bfacbed ro recovery nomodeset
        echo    '载入初始化内存盘...'
        initrd    /initrd.img-4.4.0-21-generic
    }
}

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

### BEGIN /etc/grub.d/20_linux_xen ###

### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows Boot Manager (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-efi-712A-BE30' {
    insmod part_gpt
    insmod fat
    set root='hd0,gpt1'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt1 --hint-efi=hd0,gpt1 --hint-baremetal=ahci0,gpt1  712A-BE30
    else
      search --no-floppy --fs-uuid --set=root 712A-BE30
    fi
    chainloader /EFI/Microsoft/Boot/bootmgfw.efi
}
set timeout_style=menu
if [ "${timeout}" = 0 ]; then
  set timeout=10
fi
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/30_uefi-firmware ###
menuentry 'System setup' $menuentry_id_option 'uefi-firmware' {
    fwsetup
}
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>.

/boot/efi/EFI/ubuntu/grub.cfg

search.fs_uuid e1f428f6-2e90-43b3-8f3e-ea79d3d45a6f root hd0,gpt7
set prefix=($root)'/grub'
configfile $prefix/grub.cfg

问题:
1.我安装ubuntu时是点的efi安装,是不是就调用/boot/efi/EFI/ubuntu?
2.我装的是双系统(win+ubuntu),我在/boot/grub/grub.cfg修改了默认启动项为win10(  set default="2"),并且成功了,既然是efi,为什么修改这个文件又能生效呢?

 

 

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