隐藏 GRUB2 菜单,除非您按住 Shift 键:如何实现这一点?

隐藏 GRUB2 菜单,除非您按住 Shift 键:如何实现这一点?

我有一个 Ubuntu - Windows 7 双启动设置,我希望我的笔记本电脑能够启动 Windows 7,除非我在启动后立即按下 Shift 键并调出 Grub2 菜单(从中我可以选择 Ubuntu)。

我研究了 Grub2 和 的选项etc/default/grub,并尝试了GRUB_TIMEOUTGRUB_HIDDEN_TIMEOUT值的组合,但无济于事。我尝试将 设置为高于 ,GRUB_HIDDEN_TIMEOUT以为GRUB_TIMEOUT两个倒计时同时开始,但没有——GRUB_TIMEOUT只在另一个完成后才开始。

这种行为可以实现吗?

如果是,怎么办?

答案1

我认为我找到了一个更简单的解决方案。修改文件 /etc/default/grub 中的以下几行:

GRUB_HIDDEN_TIMEOUT=0.0

GRUB_TIMEOUT=0.0

当然,我们最终运行了 update-grub。它在我的 PC 上运行良好。

答案2

这是适用于 Ubuntu 16.04 的。

我通过对上面找到的一些答案进行一些组合来解决这个问题,因此不需要修改 30_os-prober,从而避免将来更新 grub 包时进行合并......

希望能帮助到你。

改变了 /etc/default/grub 中的某些变量以反映我想要的;

GRUB_DEFAULT=4
GRUB_HIDDEN_TIMEOUT=5
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=0
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

GRUB_FORCE_HIDDEN_MENU="true"
export GRUB_FORCE_HIDDEN_MENU

然后创建一个新文件;

sudo touch /etc/grub.d/50_hidemenu
sudo chmod +x /etc/grub.d/50_hidemenu

用这个内容填充它;

#!/bin/sh
cat <<EOF
if [ "x\${timeout}" != "x-1" ]; then
  if keystatus; then
    if keystatus --shift; then
      set timeout=-1
    else
      set timeout=0
    fi
  else
    if sleep --interruptible ${GRUB_HIDDEN_TIMEOUT} ; then
      set timeout=0
    fi
  fi
fi
EOF

并更新了 grub;

sudo update-grub

干杯。

答案3

在 Kubuntu 14.04 中,这不起作用,如果您设置GRUB_TIMEOUT= 0,奇怪的是,应用此功能并重新启动后,grub 菜单仍然可见 10 秒。

原因是另一个 grub 脚本中有一段代码,如果 grub_timeout 的值为 0,则将其设置为 10。

这就是我让它工作的方法:

复制grub30_osprober文件!当出现问题时,你可以把原始文件放回去

/etc/default/grub

GRUB_DEFAULT=4    #set this value to the OS you want to boot
GRUB_HIDDEN_TIMEOUT=0

GRUB_TIMEOUT=0

/etc/grub.d/30_os-prober,有一段代码将 grub 超时设置为 10 秒(如果在 中将其设置为零)/etc/default/grub,我不知道开发人员为什么将它放在那里,但它可以防止隐藏 grub 菜单。

set timeout_style=menu

if [ "\${timeout}" = 0 ]; then    
  set timeout=10  # I changed this from 10 to 0

完成这些修改后,运行sudo update-grub即可生成新的grub启动序​​列。

我记录了我所有的 Linux 修复/修改 https://sites.google.com/site/marcshomesite/Home/linux-tuning

答案4

我也尝试过同样的方法,并在 Ubuntu 论坛上找到了很大的帮助,特别是线。

假设您对做了正确的事情/etc/default/grub,正确设置GRUB_TIMEOUTGRUB_HIDDEN_TIMEOUT(我分别说是 0 和 5)甚至GRUB_DEFAULT指定要启动的默认映像,下面是使其正确工作的程序。

  1. 添加这些行

    GRUB_FORCE_HIDDEN_MENU="true"
    export GRUB_FORCE_HIDDEN_MENU
    

    到最后/etc/default/grub

  2. 备份你的版本/etc/grub.d/30_os-prober并用此处找到的版本覆盖它

  3. 测试一下!要显示菜单,请按下SHIFT

该问题与多操作系统设置有关,编辑脚本是解决该问题的方法之一。

30_os-探测器

#! /bin/sh
set -e

# grub-mkconfig helper script.
# Copyright (C) 2006,2007,2008,2009  Free Software Foundation, Inc.
#
# GRUB is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# GRUB is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GRUB.  If not, see <http://www.gnu.org/licenses/>.

prefix="/usr"
exec_prefix="${prefix}"
datarootdir="${prefix}/share"

. "${datarootdir}/grub/grub-mkconfig_lib"

found_other_os=

make_timeout () {

  if [ "x${found_other_os}" = "x" ] || [ "x${GRUB_FORCE_HIDDEN_MENU}" = "xtrue" ] ; then 
    if [ "x${1}" != "x" ] ; then
      if [ "x${GRUB_HIDDEN_TIMEOUT_QUIET}" = "xtrue" ] ; then
    verbose=
      else
    verbose=" --verbose"
      fi

      if [ "x${1}" = "x0" ] ; then
    cat <<EOF
if [ "x\${timeout}" != "x-1" ]; then
  if keystatus; then
    if keystatus --shift; then
      set timeout=-1
    else
      set timeout=0
    fi
  else
    if sleep$verbose --interruptible 3 ; then
      set timeout=0
    fi
  fi
fi
EOF
      else
    cat << EOF
if [ "x\${timeout}" != "x-1" ]; then
  if sleep$verbose --interruptible ${GRUB_HIDDEN_TIMEOUT} ; then
    set timeout=0
  fi
fi
EOF
      fi
    fi
  fi
}

adjust_timeout () {
  if [ "x$GRUB_BUTTON_CMOS_ADDRESS" != "x" ]; then
    cat <<EOF
if cmostest $GRUB_BUTTON_CMOS_ADDRESS ; then
EOF
    make_timeout "${GRUB_HIDDEN_TIMEOUT_BUTTON}" "${GRUB_TIMEOUT_BUTTON}"
    echo else
    make_timeout "${GRUB_HIDDEN_TIMEOUT}" "${GRUB_TIMEOUT}"
    echo fi
  else
    make_timeout "${GRUB_HIDDEN_TIMEOUT}" "${GRUB_TIMEOUT}"
  fi
}

if [ "x${GRUB_DISABLE_OS_PROBER}" = "xtrue" ]; then
  adjust_timeout
  exit 0
fi

if [ -z "`which os-prober 2> /dev/null`" -o -z "`which linux-boot-prober 2> /dev/null`" ] ; then
  # missing os-prober and/or linux-boot-prober
  adjust_timeout
  exit 0
fi

OSPROBED="`os-prober | tr ' ' '^' | paste -s -d ' '`"
if [ -z "${OSPROBED}" ] ; then
  # empty os-prober output, nothing doing
  adjust_timeout
  exit 0
fi

osx_entry() {
    found_other_os=1
        cat << EOF
menuentry "${LONGNAME} (${2}-bit) (on ${DEVICE})" --class osx --class darwin --class os {
EOF
    save_default_entry | sed -e "s/^/\t/"
    prepare_grub_to_access_device ${DEVICE} | sed -e "s/^/\t/"
    cat << EOF
        load_video
        set do_resume=0
        if [ /var/vm/sleepimage -nt10 / ]; then
           if xnu_resume /var/vm/sleepimage; then
             set do_resume=1
           fi
        fi
        if [ \$do_resume = 0 ]; then
           xnu_uuid ${OSXUUID} uuid
           if [ -f /Extra/DSDT.aml ]; then
              acpi -e /Extra/DSDT.aml
           fi
           $1 /mach_kernel boot-uuid=\${uuid} rd=*uuid
           if [ /System/Library/Extensions.mkext -nt /System/Library/Extensions ]; then
              xnu_mkext /System/Library/Extensions.mkext
           else
              xnu_kextdir /System/Library/Extensions
           fi
           if [ -f /Extra/Extensions.mkext ]; then
              xnu_mkext /Extra/Extensions.mkext
           fi
           if [ -d /Extra/Extensions ]; then
              xnu_kextdir /Extra/Extensions
           fi
           if [ -f /Extra/devprop.bin ]; then
              xnu_devprop_load /Extra/devprop.bin
           fi
           if [ -f /Extra/splash.jpg ]; then
              insmod jpeg
              xnu_splash /Extra/splash.jpg
           fi
           if [ -f /Extra/splash.png ]; then
              insmod png
              xnu_splash /Extra/splash.png
           fi
           if [ -f /Extra/splash.tga ]; then
              insmod tga
              xnu_splash /Extra/splash.tga
           fi
        fi
}
EOF
}

wubi=

for OS in ${OSPROBED} ; do
  DEVICE="`echo ${OS} | cut -d ':' -f 1`"
  LONGNAME="`echo ${OS} | cut -d ':' -f 2 | tr '^' ' '`"
  LABEL="`echo ${OS} | cut -d ':' -f 3 | tr '^' ' '`"
  BOOT="`echo ${OS} | cut -d ':' -f 4`"

  if [ -z "${LONGNAME}" ] ; then
    LONGNAME="${LABEL}"
  fi

  echo "Found ${LONGNAME} on ${DEVICE}" >&2

  case ${BOOT} in
    chain)

      case ${LONGNAME} in
    Windows*)
      if [ -z "$wubi" ]; then
        if [ -x /usr/share/lupin-support/grub-mkimage ] && \
           /usr/share/lupin-support/grub-mkimage --test; then
          wubi=yes
        else
          wubi=no
        fi
      fi
      if [ "$wubi" = yes ]; then
        echo "Skipping ${LONGNAME} on Wubi system" >&2
        continue
      fi
      ;;
      esac

      found_other_os=1
      cat << EOF
menuentry "${LONGNAME} (on ${DEVICE})" --class windows --class os {
EOF
      save_default_entry | sed -e "s/^/\t/"
      prepare_grub_to_access_device ${DEVICE} | sed -e "s/^/\t/"

      case ${LONGNAME} in
    Windows\ Vista*|Windows\ 7*|Windows\ Server\ 2008*)
    ;;
    *)
      cat << EOF
    drivemap -s (hd0) \${root}
EOF
    ;;
      esac

      cat <<EOF
    chainloader +1
}
EOF
    ;;
    linux)
      LINUXPROBED="`linux-boot-prober ${DEVICE} 2> /dev/null | tr ' ' '^' | paste -s -d ' '`"
      prepare_boot_cache=

      for LINUX in ${LINUXPROBED} ; do
        LROOT="`echo ${LINUX} | cut -d ':' -f 1`"
        LBOOT="`echo ${LINUX} | cut -d ':' -f 2`"
        LLABEL="`echo ${LINUX} | cut -d ':' -f 3 | tr '^' ' '`"
        LKERNEL="`echo ${LINUX} | cut -d ':' -f 4`"
        LINITRD="`echo ${LINUX} | cut -d ':' -f 5`"
        LPARAMS="`echo ${LINUX} | cut -d ':' -f 6- | tr '^' ' '`"

        if [ -z "${LLABEL}" ] ; then
          LLABEL="${LONGNAME}"
        fi

    if [ "${LROOT}" != "${LBOOT}" ]; then
      LKERNEL="${LKERNEL#/boot}"
      LINITRD="${LINITRD#/boot}"
    fi

    if [ -z "${prepare_boot_cache}" ]; then
      prepare_boot_cache="$(prepare_grub_to_access_device ${LBOOT} | sed -e "s/^/\t/")"
      [ "${prepare_boot_cache}" ] || continue
    fi
    found_other_os=1
        cat << EOF
menuentry "${LLABEL} (on ${DEVICE})" --class gnu-linux --class gnu --class os {
EOF
    save_default_entry | sed -e "s/^/\t/"
    printf '%s\n' "${prepare_boot_cache}"
    cat <<  EOF
    linux ${LKERNEL} ${LPARAMS}
EOF
        if [ -n "${LINITRD}" ] ; then
          cat << EOF
    initrd ${LINITRD}
EOF
        fi
        cat << EOF
}
EOF
      done
    ;;
    macosx)
      OSXUUID="`grub-probe --target=fs_uuid --device ${DEVICE} 2> /dev/null`"
      osx_entry xnu_kernel 32
      osx_entry xnu_kernel64 64
    ;;
    hurd)
      found_other_os=1
      cat << EOF
menuentry "${LONGNAME} (on ${DEVICE})" --class hurd --class gnu --class os {
EOF
      save_default_entry | sed -e "s/^/\t/"
      prepare_grub_to_access_device ${DEVICE} | sed -e "s/^/\t/"
      grub_device="`${grub_probe} --device ${DEVICE} --target=drive`"
      mach_device="`echo "${grub_device}" | sed -e 's/(\(hd.*\),msdos\(.*\))/\1s\2/'`"
      grub_fs="`${grub_probe} --device ${DEVICE} --target=fs`"
      case "${grub_fs}" in
    *fs)    hurd_fs="${grub_fs}" ;;
    *)  hurd_fs="${grub_fs}fs" ;;
      esac
      cat << EOF
    multiboot /boot/gnumach.gz root=device:${mach_device}
    module /hurd/${hurd_fs}.static ${hurd_fs} --readonly \\
            --multiboot-command-line='\${kernel-command-line}' \\
            --host-priv-port='\${host-port}' \\
            --device-master-port='\${device-port}' \\
            --exec-server-task='\${exec-task}' -T typed '\${root}' \\
            '\$(task-create)' '\$(task-resume)'
    module /lib/ld.so.1 exec /hurd/exec '\$(exec-task=task-create)'
}
EOF
    ;;
    *)
      echo "  ${LONGNAME} is not yet supported by grub-mkconfig." >&2
    ;;
  esac
done

adjust_timeout


    cat <<EOF
if [ "x\${timeout}" != "x-1" ]; then
  if keystatus; then
    if keystatus --shift; then
      set timeout=-1
    else
      set timeout=0
    fi
  else
    if sleep$verbose --interruptible 3 ; then
      set timeout=0
    fi
  fi
fi
EOF

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