我尝试使用该命令sudo update-grub，但响应是：
/usr/sbin/grub-mkconfig: 36: /etc/default/grub: Syntax error: EOF in backquote substitution
然后当我打开时/usr/sbin/grub-mkconfig，里面的东西如下：
#! /bin/sh
set -e
# Generate grub.cfg by inspecting /boot contents.
# Copyright (C) 2006,2007,2008,2009,2010 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="/usr"
datarootdir="/usr/share"
prefix="/usr"
exec_prefix="/usr"
sbindir="${exec_prefix}/sbin"
bindir="${exec_prefix}/bin"
sysconfdir="/etc"
PACKAGE_NAME=GRUB
PACKAGE_VERSION=2.02~beta3-4ubuntu2.2
host_os=linux-gnu
datadir="${datarootdir}"
if [ "x$pkgdatadir" = x ]; then
pkgdatadir="${datadir}/grub"
fi
# export it for scripts
export pkgdatadir
grub_cfg=""
grub_mkconfig_dir="${sysconfdir}"/grub.d
self=`basename $0`
grub_probe="${sbindir}/grub-probe"
grub_file="${bindir}/grub-file"
grub_editenv="${bindir}/grub-editenv"
grub_script_check="${bindir}/grub-script-check"
export TEXTDOMAIN=grub
export TEXTDOMAINDIR="${datarootdir}/locale"
. "${pkgdatadir}/grub-mkconfig_lib"
# Usage: usage
# Print the usage.
usage () {
gettext_printf "Usage: %s [OPTION]\n" "$self"
gettext "Generate a grub config file"; echo
echo
print_option_help "-o, --output=$(gettext FILE)" "$(gettext "output generated config to FILE [default=stdout]")"
print_option_help "-h, --help" "$(gettext "print this message and exit")"
print_option_help "-v, --version" "$(gettext "print the version information and exit")"
echo
gettext "Report bugs to <[email protected]>."; echo
}
argument () {
opt=$1
shift
if test $# -eq 0; then
gettext_printf "%s: option requires an argument -- \`%s'\n" "$self" "$opt" 1>&2
exit 1
fi
echo $1
}
# Check the arguments.
while test $# -gt 0
do
option=$1
shift
case "$option" in
-h | --help)
usage
exit 0 ;;
-V | --version)
echo "$self (${PACKAGE_NAME}) ${PACKAGE_VERSION}"
exit 0 ;;
-o | --output)
grub_cfg=`argument $option "$@"`; shift;;
--output=*)
grub_cfg=`echo "$option" | sed 's/--output=//'`
;;
-*)
gettext_printf "Unrecognized option \`%s'\n" "$option" 1>&2
usage
exit 1
;;
# Explicitly ignore non-option arguments, for compatibility.
esac
done
if fgrep -qs '${GRUB_PREFIX}/video.lst' "${grub_mkconfig_dir}/00_header"; then
echo "GRUB >= 2.00 has been unpacked but not yet configured." >&2
echo "grub-mkconfig will not work until the upgrade is complete." >&2
echo "It should run later as part of configuring the new GRUB packages." >&2
exit 0
fi
if [ "x$EUID" = "x" ] ; then
EUID=`id -u`
fi
if [ "$EUID" != 0 ] ; then
root=f
case "`uname 2>/dev/null`" in
CYGWIN*)
# Cygwin: Assume root if member of admin group
for g in `id -G 2>/dev/null` ; do
case $g in
0|544) root=t ;;
esac
done ;;
esac
if [ $root != t ] ; then
gettext_printf "%s: You must run this as root\n" "$self" >&2
exit 1
fi
fi
set $grub_probe dummy
if test -f "$1"; then
:
else
gettext_printf "%s: Not found.\n" "$1" 1>&2
exit 1
fi
# Device containing our userland. Typically used for root= parameter.
GRUB_DEVICE="`${grub_probe} --target=device /`"
GRUB_DEVICE_UUID="`${grub_probe} --device ${GRUB_DEVICE} --target=fs_uuid 2> /dev/null`" || true
# Device containing our /boot partition. Usually the same as GRUB_DEVICE.
GRUB_DEVICE_BOOT="`${grub_probe} --target=device /boot`"
GRUB_DEVICE_BOOT_UUID="`${grub_probe} --device ${GRUB_DEVICE_BOOT} --target=fs_uuid 2> /dev/null`" || true
# Filesystem for the device containing our userland. Used for stuff like
# choosing Hurd filesystem module.
GRUB_FS="`${grub_probe} --device ${GRUB_DEVICE} --target=fs 2> /dev/null || echo unknown`"
if [ x"$GRUB_FS" = xunknown ]; then
GRUB_FS="$(stat -f --printf=%T / || echo unknown)"
fi
if test -f ${sysconfdir}/default/grub ; then
. ${sysconfdir}/default/grub
fi
for x in ${sysconfdir}/default/grub.d/*.cfg ; do
if [ -e "${x}" ]; then
. "${x}"
fi
done
# XXX: should this be deprecated at some point?
if [ "x${GRUB_TERMINAL}" != "x" ] ; then
GRUB_TERMINAL_INPUT="${GRUB_TERMINAL}"
GRUB_TERMINAL_OUTPUT="${GRUB_TERMINAL}"
fi
termoutdefault=0
if [ "x${GRUB_TERMINAL_OUTPUT}" = "x" ]; then
GRUB_TERMINAL_OUTPUT=gfxterm;
termoutdefault=1;
fi
for x in ${GRUB_TERMINAL_OUTPUT}; do
case "x${x}" in
xgfxterm) ;;
xconsole | xserial | xofconsole | xvga_text)
# make sure all our children behave in conformance with ascii..
export LANG=C;;
*) echo "Invalid output terminal \"${GRUB_TERMINAL_OUTPUT}\"" >&2 ; exit 1 ;;
esac
done
GRUB_ACTUAL_DEFAULT="$GRUB_DEFAULT"
if [ "x${GRUB_ACTUAL_DEFAULT}" = "xsaved" ] ; then GRUB_ACTUAL_DEFAULT="`"${grub_editenv}" - list | sed -n '/^saved_entry=/ s,^saved_entry=,,p'`" ; fi
if [ "x${GRUB_RECOVERY_TITLE}" = "x" ]; then
GRUB_RECOVERY_TITLE="recovery mode"
fi
# These are defined in this script, export them here so that user can
# override them.
export GRUB_DEVICE \
GRUB_DEVICE_UUID \
GRUB_DEVICE_BOOT \
GRUB_DEVICE_BOOT_UUID \
GRUB_FS \
GRUB_FONT \
GRUB_PRELOAD_MODULES \
GRUB_ACTUAL_DEFAULT
# These are optional, user-defined variables.
export GRUB_DEFAULT \
GRUB_HIDDEN_TIMEOUT \
GRUB_HIDDEN_TIMEOUT_QUIET \
GRUB_TIMEOUT \
GRUB_TIMEOUT_STYLE \
GRUB_DEFAULT_BUTTON \
GRUB_HIDDEN_TIMEOUT_BUTTON \
GRUB_TIMEOUT_BUTTON \
GRUB_TIMEOUT_STYLE_BUTTON \
GRUB_BUTTON_CMOS_ADDRESS \
GRUB_BUTTON_CMOS_CLEAN \
GRUB_DISTRIBUTOR \
GRUB_CMDLINE_LINUX \
GRUB_CMDLINE_LINUX_DEFAULT \
GRUB_CMDLINE_XEN \
GRUB_CMDLINE_XEN_DEFAULT \
GRUB_CMDLINE_LINUX_XEN_REPLACE \
GRUB_CMDLINE_LINUX_XEN_REPLACE_DEFAULT \
GRUB_CMDLINE_NETBSD \
GRUB_CMDLINE_NETBSD_DEFAULT \
GRUB_CMDLINE_GNUMACH \
GRUB_TERMINAL_INPUT \
GRUB_TERMINAL_OUTPUT \
GRUB_SERIAL_COMMAND \
GRUB_DISABLE_LINUX_UUID \
GRUB_DISABLE_RECOVERY \
GRUB_VIDEO_BACKEND \
GRUB_GFXMODE \
GRUB_BACKGROUND \
GRUB_THEME \
GRUB_GFXPAYLOAD_LINUX \
GRUB_DISABLE_OS_PROBER \
GRUB_INIT_TUNE \
GRUB_SAVEDEFAULT \
GRUB_ENABLE_CRYPTODISK \
GRUB_BADRAM \
GRUB_OS_PROBER_SKIP_LIST \
GRUB_DISABLE_SUBMENU \
GRUB_RECORDFAIL_TIMEOUT \
GRUB_RECOVERY_TITLE \
GRUB_FORCE_PARTUUID \
GRUB_DISABLE_INITRD
if test "x${grub_cfg}" != "x"; then
rm -f "${grub_cfg}.new"
oldumask=$(umask); umask 077
exec > "${grub_cfg}.new"
umask $oldumask
fi
gettext "Generating grub configuration file ..." >&2
echo >&2
cat << EOF
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by $self using templates
# from ${grub_mkconfig_dir} and settings from ${sysconfdir}/default/grub
#
EOF
for i in "${grub_mkconfig_dir}"/* ; do
case "$i" in
# emacsen backup files. FIXME: support other editors
*~) ;;
# emacsen autosave files. FIXME: support other editors
*/\#*\#) ;;
*)
if grub_file_is_not_garbage "$i" && test -x "$i" ; then
echo
echo "### BEGIN $i ###"
"$i"
echo "### END $i ###"
fi
;;
esac
done
if [ "x${grub_cfg}" != "x" ] && ! grep "^password" ${grub_cfg}.new >/dev/null; then
chmod 444 ${grub_cfg}.new || true
fi
if test "x${grub_cfg}" != "x" ; then
if ! ${grub_script_check} ${grub_cfg}.new; then
# TRANSLATORS: %s is replaced by filename
gettext_printf "Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
%s file attached." "${grub_cfg}.new" >&2
echo >&2
else
# none of the children aborted with error, install the new grub.cfg
mv -f ${grub_cfg}.new ${grub_cfg}
fi
fi
gettext "done" >&2
echo >&2
我认为我的grub-mkconfig错了，具体找不到问题出在哪里，可能是我的grub-mkconfig是默认设置。