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dicker36@dicker36-linux:/$ ls -al /etc/grub.d/
insgesamt 244
drwxr-xr-x   4 root root  4096 Nov 25 19:22 .
drwxr-xr-x 148 root root 12288 Nov 27 18:43 ..
-rwxr-xr-x   1 root root 10661 Okt  2 16:23 00_header
-rwxr-xr-x   1 root root  6260 Dez  2  2022 05_debian_theme
-rwxr-xr-x   1 root root 18228 Okt  2 16:23 10_linux
-rw-r--r--   1 root root   714 Nov  4 18:52 10_linux_proxy
-rwxr-xr-x   1 root root 43202 Okt  2 16:23 10_linux_zfs
-rwxr-xr-x   1 root root 43031 Dez 18  2022 11_linux_zfs
-rwxr-xr-x   1 root root 14459 Okt  2 16:23 20_linux_xen
-rwxr-xr-x   1 root root  4228 Aug 19 12:40 20_memtest86+
-rwxr-xr-x   1 root root  2924 Feb  6  2022 21_memtest86+
-rwxr-xr-x   1 root root   786 Okt  2 16:23 25_bli
-rwxr-xr-x   1 root root 13120 Okt  2 16:23 30_os-prober
-rw-r--r--   1 root root   219 Nov  4 18:52 30_os-prober_proxy
-rwxr-xr-x   1 root root  1174 Okt  2 16:23 30_uefi-firmware
-rwxr-xr-x   1 root root  1372 Dez 18  2022 33_uefi-firmware
-rwxr-xr-x   1 root root   722 Feb 26  2023 35_fwupd
-rwxr-xr-x   1 root root   214 Dez 18  2022 40_custom
-rwxr-xr-x   1 root root   215 Dez 18  2022 41_custom
drwxr-xr-x   4 root root  4096 Nov  4 18:20 backup
drwxr-xr-x   2 root root  4096 Nov  4 18:20 bin
-rwxr-xr-x   1 root root    46 Nov 25 18:58 LS_linux
-rwxr-xr-x   1 root root    50 Nov 25 18:58 LS_os-prober
-rw-r--r--   1 root root   483 Dez 18  2022 README
-rw-r--r--   1 root root   210 Nov  4 18:52 .script_sources.txt

dicker36@dicker36-linux:/$ sudo update-grub
[sudo] Passwort für dicker36: 
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-6.5.0-13-generic
Found initrd image: /boot/initrd.img-6.5.0-13-generic
Found linux image: /boot/vmlinuz-6.2.0-39-generic
Found initrd image: /boot/initrd.img-6.2.0-39-generic
Found memtest86+ 64bit EFI image: /boot/memtest86+x64.efi
Memtest86+ needs a 16-bit boot, that is not available on EFI, exiting
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
Found Windows Boot Manager on /dev/nvme0n1p1@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for UEFI Firmware Settings ...
Adding boot menu entry for UEFI Firmware Settings ...
/etc/grub.d/LS_linux: 2: /etc/grub.d/proxifiedScripts/linux: not found

dicker36@dicker36-linux:/$ cat /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 $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
if [ "${initrdfail}" = 2 ]; then
   set initrdfail=
elif [ "${initrdfail}" = 1 ]; then
   set next_entry="${prev_entry}"
   set prev_entry=
   save_env prev_entry
   if [ "${next_entry}" ]; then
      set initrdfail=2
   fi
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
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 initrdfail {
    if [ -n "${have_grubenv}" ]; then if [ -n "${partuuid}" ]; then
      if [ -z "${initrdfail}" ]; then
        set initrdfail=1
        if [ -n "${boot_once}" ]; then
          set prev_entry="${default}"
          save_env prev_entry
        fi
      fi
      save_env initrdfail
    fi; fi
}
function recordfail {
  set recordfail=1
  if [ -n "${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$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_gpt
insmod ext2
set root='hd1,gpt6'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 --hint='hd1,gpt6'  b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
else
  search --no-floppy --fs-uuid --set=root b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
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=de_DE
  insmod gettext
fi
terminal_output gfxterm
if [ "${recordfail}" = 1 ] ; then
  set timeout=30
else
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=hidden
    set timeout=15
  # Fallback hidden-timeout code in case the timeout_style feature is
  # unavailable.
  elif sleep --interruptible 15 ; then
    set timeout=0
  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
### 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 [ ${grub_platform} != pc ]; then
      set linux_gfx_mode=keep
    elif 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-b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9' {
	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='hd1,gpt6'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 --hint='hd1,gpt6'  b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
	else
	  search --no-floppy --fs-uuid --set=root b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
	fi
	linux	/boot/vmlinuz-6.5.0-13-generic root=UUID=b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9 ro  quiet splash $vt_handoff
	initrd	/boot/initrd.img-6.5.0-13-generic
}
submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9' {
	menuentry 'Ubuntu, with Linux 6.5.0-13-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.5.0-13-generic-advanced-b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9' {
		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='hd1,gpt6'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 --hint='hd1,gpt6'  b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
		else
		  search --no-floppy --fs-uuid --set=root b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
		fi
		echo	'Loading Linux 6.5.0-13-generic ...'
		linux	/boot/vmlinuz-6.5.0-13-generic root=UUID=b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9 ro  quiet splash $vt_handoff
		echo	'Loading initial ramdisk ...'
		initrd	/boot/initrd.img-6.5.0-13-generic
	}
	menuentry 'Ubuntu, with Linux 6.5.0-13-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.5.0-13-generic-recovery-b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9' {
		recordfail
		load_video
		insmod gzio
		if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
		insmod part_gpt
		insmod ext2
		set root='hd1,gpt6'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 --hint='hd1,gpt6'  b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
		else
		  search --no-floppy --fs-uuid --set=root b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
		fi
		echo	'Loading Linux 6.5.0-13-generic ...'
		linux	/boot/vmlinuz-6.5.0-13-generic root=UUID=b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9 ro single recovery nomodeset dis_ucode_ldr 
		echo	'Loading initial ramdisk ...'
		initrd	/boot/initrd.img-6.5.0-13-generic
	}
	menuentry 'Ubuntu, with Linux 6.2.0-39-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.2.0-39-generic-advanced-b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9' {
		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='hd1,gpt6'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 --hint='hd1,gpt6'  b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
		else
		  search --no-floppy --fs-uuid --set=root b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
		fi
		echo	'Loading Linux 6.2.0-39-generic ...'
		linux	/boot/vmlinuz-6.2.0-39-generic root=UUID=b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9 ro  quiet splash $vt_handoff
		echo	'Loading initial ramdisk ...'
		initrd	/boot/initrd.img-6.2.0-39-generic
	}
	menuentry 'Ubuntu, with Linux 6.2.0-39-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-6.2.0-39-generic-recovery-b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9' {
		recordfail
		load_video
		insmod gzio
		if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
		insmod part_gpt
		insmod ext2
		set root='hd1,gpt6'
		if [ x$feature_platform_search_hint = xy ]; then
		  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 --hint='hd1,gpt6'  b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
		else
		  search --no-floppy --fs-uuid --set=root b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
		fi
		echo	'Loading Linux 6.2.0-39-generic ...'
		linux	/boot/vmlinuz-6.2.0-39-generic root=UUID=b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9 ro single recovery nomodeset dis_ucode_ldr 
		echo	'Loading initial ramdisk ...'
		initrd	/boot/initrd.img-6.2.0-39-generic
	}
}

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

### BEGIN /etc/grub.d/10_linux_zfs ###
### END /etc/grub.d/10_linux_zfs ###

### BEGIN /etc/grub.d/11_linux_zfs ###
### END /etc/grub.d/11_linux_zfs ###

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

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

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+x64.efi)" --class memtest $menuentry_id_option 'memtest86+' {
	insmod part_gpt
	insmod ext2
	set root='hd1,gpt6'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 --hint='hd1,gpt6'  b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
	else
	  search --no-floppy --fs-uuid --set=root b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
	fi
        linux    /boot/memtest86+x64.efi
}
menuentry 'Memory test (memtest86+x64.efi, serial console)' --class memtest $menuentry_id_option 'memtest86+-serial' {
	insmod part_gpt
	insmod ext2
	set root='hd1,gpt6'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt6 --hint-efi=hd0,gpt6 --hint-baremetal=ahci0,gpt6 --hint='hd1,gpt6'  b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
	else
	  search --no-floppy --fs-uuid --set=root b9df3c05-dad4-4d7c-b8d8-cf006db2f4d9
	fi
        linux   /boot/memtest86+x64.efi console=ttyS0,115200
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/21_memtest86+ ###
### END /etc/grub.d/21_memtest86+ ###

### BEGIN /etc/grub.d/25_bli ###
if [ "$grub_platform" = "efi" ]; then
  insmod bli
fi
### END /etc/grub.d/25_bli ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry 'Windows Boot Manager (on /dev/nvme0n1p1)' --class windows --class os $menuentry_id_option 'osprober-efi-EA23-4EFE' {
	insmod part_gpt
	insmod fat
	set root='hd0,gpt1'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint='hd0,gpt1'  EA23-4EFE
	else
	  search --no-floppy --fs-uuid --set=root EA23-4EFE
	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 ###
if [ "$grub_platform" = "efi" ]; then
	fwsetup --is-supported
	if [ "$?" = 0 ]; then
		menuentry 'UEFI Firmware Settings' $menuentry_id_option 'uefi-firmware' {
			fwsetup
		}
	fi
fi
### END /etc/grub.d/30_uefi-firmware ###

### BEGIN /etc/grub.d/33_uefi-firmware ###
menuentry 'UEFI Firmware Settings' $menuentry_id_option 'uefi-firmware' {
	fwsetup
}
### END /etc/grub.d/33_uefi-firmware ###

### BEGIN /etc/grub.d/35_fwupd ###
### END /etc/grub.d/35_fwupd ###

### 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 ###

### BEGIN /etc/grub.d/LS_os-prober ###
menuentry 'Windows Boot Manager (on /dev/nvme0n1p1)' --class windows --class os $menuentry_id_option 'osprober-efi-EA23-4EFE' {
	insmod part_gpt
	insmod fat
	set root='hd0,gpt1'
	if [ x$feature_platform_search_hint = xy ]; then
	  search --no-floppy --fs-uuid --set=root --hint='hd0,gpt1'  EA23-4EFE
	else
	  search --no-floppy --fs-uuid --set=root EA23-4EFE
	fi
	chainloader /EFI/Microsoft/Boot/bootmgfw.efi
}
set timeout_style=menu
if [ "${timeout}" = 0 ]; then
  set timeout=10
fi
### END /etc/grub.d/LS_os-prober ###

dicker36@dicker36-linux:~$ dpkg -l | grep memtest
ii  memtest86+                                    6.20-3                                  
           amd64        thorough real-mode memory tester

dicker36@dicker36-linux:~$ sudo update-grub
Sourcing file `/etc/default/grub'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-6.5.0-13-generic
Found initrd image: /boot/initrd.img-6.5.0-13-generic
Found linux image: /boot/vmlinuz-6.2.0-39-generic
Found initrd image: /boot/initrd.img-6.2.0-39-generic
Found memtest86+ 64bit EFI image: /boot/memtest86+x64.efi
Memtest86+ needs a 16-bit boot, that is not available on EFI, exiting
Warning: os-prober will be executed to detect other bootable partitions.
Its output will be used to detect bootable binaries on them and create new boot entries.
Found Windows Boot Manager on /dev/nvme0n1p1@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for UEFI Firmware Settings ...
done