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fdisk -l

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root@ubuntu:/# sudo gedit /etc/grub.d/30_os-prober
No protocol specified

(gedit:5527): Gtk-WARNING **: cannot open display: :0.0

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root@ubuntu:/# sudo gedit /etc/default/grub
No protocol specified

(gedit:5549): Gtk-WARNING **: cannot open display: :0.0

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#
# 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 $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
set default="0"
if [ "${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
}

function load_video {
  insmod vbe
  insmod vga
}

insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  load_video
  insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920
set locale_dir=($root)/boot/grub/locale
set lang=de
insmod gettext
if [ "${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, with Linux 2.6.35-28-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920
linux/boot/vmlinuz-2.6.35-28-generic root=UUID=3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920 ro   quiet splash
initrd/boot/initrd.img-2.6.35-28-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-28-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920
echo'Loading Linux 2.6.35-28-generic ...'
linux/boot/vmlinuz-2.6.35-28-generic root=UUID=3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920 ro single 
echo'Loading initial ramdisk ...'
initrd/boot/initrd.img-2.6.35-28-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-22-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920
linux/boot/vmlinuz-2.6.35-22-generic root=UUID=3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920 ro   quiet splash
initrd/boot/initrd.img-2.6.35-22-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-22-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920
echo'Loading Linux 2.6.35-22-generic ...'
linux/boot/vmlinuz-2.6.35-22-generic root=UUID=3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920 ro single 
echo'Loading initial ramdisk ...'
initrd/boot/initrd.img-2.6.35-22-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+ ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920
linux16/boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set 3f5ed79d-86d3-4ded-9fd5-9acbd9d8e920
linux16/boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### 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  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###

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#! /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=${prefix}
libdir=${exec_prefix}/lib

. ${libdir}/grub/grub-mkconfig_lib

found_other_os=

make_timeout () {
  if [ "x${found_other_os}" = "x" ] ; then
	if [ "x${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() {
    	cat << EOF
menuentry "${LONGNAME} (${2}-bit) (on ${DEVICE})" {
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
}

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
  found_other_os=1

  case ${BOOT} in
	chain)

  	cat << EOF
menuentry "${LONGNAME} (on ${DEVICE})" {
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*)
	;;
	*)
	  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

    	cat << EOF
menuentry "${LLABEL} (on ${DEVICE})" {
EOF
	save_default_entry | sed -e "s/^/\t/"
	if [ -z "${prepare_boot_cache}" ]; then
	  prepare_boot_cache="$(prepare_grub_to_access_device ${LBOOT} | sed -e "s/^/\t/")"
	fi
	printf '%s\n' "${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 ${DEVICE} 2> /dev/null`"
  	osx_entry xnu_kernel 32
  	osx_entry xnu_kernel64 64
	;;
	hurd)
  	cat << EOF
menuentry "${LONGNAME} (on ${DEVICE})" {
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}" | tr -d '()' | tr , s`"
  	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