I updated lubuntu on my triple boot system, and lost the other 2

[MASONTX]

I normally boot to ubuntu, with the option of booting to lubuntu or ubuntu netbook remix. It has been awhile since I updated the Lubuntu install, so I booted into lubuntu, went to synaptic and did a reload/update. All seemed normal, but now when I boot it only shows the kernals for the lubuntu install, not ubuntu or remix. How do I get grub back to seeing all 3?

[yancek]

I normally boot to ubuntu

Does that mean you were using the Ubuntu Grub to boot all systems previously?

The first thing I would suggest is to boot lubuntu and run fdisk -l to verify all partitions which were previously there are still there. While booted into lubuntu, check the grub.cfg file to see if there are any entries for you other operating systems.

Generally, running: sudo os-prober and subsequently sudo update-grub will resolve this.

If that doesn't work, you might take a look at this Ubuntu Grub site to see if you can find more info:

https://help.ubuntu.com/community/Grub2

[Jonathan183]

If your still struggling with this then posting the output of
sudo blkid
sudo cat /boot/grub/grub.cfg
would be useful, and also the output of
ls /etc/grub.d/ -l

[MASONTX]

blkid
/dev/sda1: UUID="09f17f83-70ab-4188-81c4-d82b1717c059" TYPE="ext4"
/dev/sda5: UUID="f849ca00-5137-4223-a106-c554bce2da9a" TYPE="swap"
/dev/sda6: UUID="986d75c8-0755-448e-b46b-f7e5531e6958" TYPE="ext4"
/dev/sda7: UUID="964e842f-42ca-40f4-a0c8-e0dbf69fa77c" TYPE="swap"
/dev/sda8: UUID="b8a37408-9388-40ef-a514-f07db2806d6f" TYPE="ext4"
/dev/sda9: UUID="f77575d8-0352-46c4-bd9d-bd98fcecfbff" TYPE="swap"

[MASONTX]

sudo: cat/boot/grub/grub.cfg: command not found
david@Daviddesktop:~$ ls /etc/grub.d/ -l
total 52
-rwxr-xr-x 1 root root 6831 2010-10-06 07:23 00_header
-rwxr-xr-x 1 root root 1481 2010-10-06 07:05 05_debian_theme
-rwxr-xr-x 1 root root 4757 2010-10-06 07:23 10_linux
-rwxr-xr-x 1 root root 5028 2010-10-06 07:23 20_linux_xen
-rwxr-xr-x 1 root root 1588 2010-09-24 12:14 20_memtest86+
-rwxr-xr-x 1 root root 6933 2010-10-06 07:23 30_os-prober
-rwxr-xr-x 1 root root 214 2010-10-06 07:23 40_custom
-rwxr-xr-x 1 root root 95 2010-10-06 07:23 41_custom
-rw-r--r-- 1 root root 483 2010-10-06 07:23 README

Running yancek's sudo os-prober also showed command not found. The partitions appear to be intact, but when the updated kernel-30 installed, it didn't pick them up. Now my only option is the lubuntu installs kernel -28 or -30

Thanks for the help, I have updated lots of times without incident, and not sure what went wrong this time.

[fanderal]

I think a space between cat and /boot might avoid 'command not found.' A workaround when the other way doesn't do it... mount all the root partitions and then update grub.

[jayd512]

Since os-prober reports command not found, I have to ask which version of GRUB are you using?

[MASONTX]

Thanks, output is

#
# 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,msdos6)'
search --no-floppy --fs-uuid --set 986d75c8-0755-448e-b46b-f7e5531e6958
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,msdos6)'
search --no-floppy --fs-uuid --set 986d75c8-0755-448e-b46b-f7e5531e6958
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
if [ "${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 2.6.35-30-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set 986d75c8-0755-448e-b46b-f7e5531e6958
linux /boot/vmlinuz-2.6.35-30-generic root=UUID=986d75c8-0755-448e-b46b-f7e5531e6958 ro quiet splash
initrd /boot/initrd.img-2.6.35-30-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-30-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set 986d75c8-0755-448e-b46b-f7e5531e6958
echo 'Loading Linux 2.6.35-30-generic ...'
linux /boot/vmlinuz-2.6.35-30-generic root=UUID=986d75c8-0755-448e-b46b-f7e5531e6958 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.35-30-generic
}
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,msdos6)'
search --no-floppy --fs-uuid --set 986d75c8-0755-448e-b46b-f7e5531e6958
linux /boot/vmlinuz-2.6.35-28-generic root=UUID=986d75c8-0755-448e-b46b-f7e5531e6958 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,msdos6)'
search --no-floppy --fs-uuid --set 986d75c8-0755-448e-b46b-f7e5531e6958
echo 'Loading Linux 2.6.35-28-generic ...'
linux /boot/vmlinuz-2.6.35-28-generic root=UUID=986d75c8-0755-448e-b46b-f7e5531e6958 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.35-28-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,msdos6)'
search --no-floppy --fs-uuid --set 986d75c8-0755-448e-b46b-f7e5531e6958
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set 986d75c8-0755-448e-b46b-f7e5531e6958
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 ###

[yancek]

All of your entries are (hd0,6) which is sda7. Is that your Lubuntu partition? Have you tried sudo update-grub and if so, what happens? os-prober may not be installed. Lubuntu does use sudo, right?

[jayd512]

Well... never mind my question!