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How to add same Ubuntu operating system as backup to GRUB?
Trouble booting CentOSHow to repair the grub on debianHow to add Puppy Linux to grub menu installed by Ubuntu?GRUB does not boot automaticallyAfter installing a new Kernel in Ubuntu 14.04, rebooting takes me to busybox initramfs. How do I mount a filesystem after that?No entries for Ubuntu after executing update-grub on CentOSA TUNE to add to the /etc/default/grub fileBoot Debian and Gentoo with Grub. Kernel Panic!How to add Ubuntu into grub on CentOSKeep kernel files in different directories
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I have 4 partitions on my hard disk:
- 15 GB Ubuntu OS (mounted to /) - sda 2
- 15 GB Backup (not mounted) - sda 3
- 505 MB Grub (/boot/efi) - sda 1
- 89 GB GB Data (mount /data) - sda 4
For LTS updates, e.g. 16.04 to 18.04, I want to copy (with dd) my first partition (sda2) to the second (sda3).
That way, I can do the release update on sda2 and if this fails, I have a backup on sda3.
I tried a lot of stuff to boot from sda3, but the menu entry doesn't show
up (I used update-grub).
Used dd command: dd if=/dev/sda2 of=/dev/sda3
My file /etc/grub.d/40_custom
#!/bin/sh
exec tail -n +3 $0
# 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.
menuentry "Backup"
set root=(hd0,3)
linux /vmlinuz root=/dev/sda3 ro quiet splash
initrd /initrd.img
Output of update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/50-curtin-settings.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-47-generic
Found initrd image: /boot/initrd.img-4.15.0-47-generic
Adding boot menu entry for EFI firmware configuration
done
My File /boot/grub/menu.lst
default 0
timeout 0
hiddenmenu
title Ubuntu 18.04.2 LTS, kernel 4.15.0-47-generic
root (hd0)
kernel /boot/vmlinuz-4.15.0-47-generic root=/dev/hda1 ro console=hvc0
initrd /boot/initrd.img-4.15.0-47-generic
title Ubuntu 18.04.2 LTS, kernel 4.15.0-47-generic (recovery mode)
root (hd0)
kernel /boot/vmlinuz-4.15.0-47-generic root=/dev/hda1 ro single
initrd /boot/initrd.img-4.15.0-47-generic
boot partition grub2 grub
edited Apr 5 at 18:00
fra-san
2,0271620
asked Apr 5 at 8:14
FalseFalse
63
|
show 7 more comments
I have 4 partitions on my hard disk:
- 15 GB Ubuntu OS (mounted to /) - sda 2
- 15 GB Backup (not mounted) - sda 3
- 505 MB Grub (/boot/efi) - sda 1
- 89 GB GB Data (mount /data) - sda 4
For LTS updates, e.g. 16.04 to 18.04, I want to copy (with dd) my first partition (sda2) to the second (sda3).
That way, I can do the release update on sda2 and if this fails, I have a backup on sda3.
I tried a lot of stuff to boot from sda3, but the menu entry doesn't show
up (I used update-grub).
Used dd command: dd if=/dev/sda2 of=/dev/sda3
My file /etc/grub.d/40_custom
#!/bin/sh
exec tail -n +3 $0
# 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.
menuentry "Backup"
set root=(hd0,3)
linux /vmlinuz root=/dev/sda3 ro quiet splash
initrd /initrd.img
Output of update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/50-curtin-settings.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-47-generic
Found initrd image: /boot/initrd.img-4.15.0-47-generic
Adding boot menu entry for EFI firmware configuration
done
My File /boot/grub/menu.lst
default 0
timeout 0
hiddenmenu
title Ubuntu 18.04.2 LTS, kernel 4.15.0-47-generic
root (hd0)
kernel /boot/vmlinuz-4.15.0-47-generic root=/dev/hda1 ro console=hvc0
initrd /boot/initrd.img-4.15.0-47-generic
title Ubuntu 18.04.2 LTS, kernel 4.15.0-47-generic (recovery mode)
root (hd0)
kernel /boot/vmlinuz-4.15.0-47-generic root=/dev/hda1 ro single
initrd /boot/initrd.img-4.15.0-47-generic
boot partition grub2 grub
edited Apr 5 at 18:00
fra-san
2,0271620
asked Apr 5 at 8:14
FalseFalse
63
@terdon i added now a custom menuentry.. see above...
– False
Apr 5 at 8:54
Thank you, that's much clearer now! Did you rungrub-installafterupdate-grub? If not, no new menu entry will be created if I remember correctly.
– terdon♦
Apr 5 at 9:01
In the example above i only run grub-install, the menuentry is shown in grub. But it boots the same system as the original boot entry (both sda2)
– False
Apr 5 at 9:09
What? Why didn't you mention that then? What menu entry? Please tell us all of these details, it is really tiring to have to drag them out of you bit by bit like this. The more information you give us, the better our chances of understanding and helping you.
– terdon♦
Apr 5 at 9:12
1
Please check in/etc/default/grubif there is a lineGRUB_DISABLE_OS_PROBER=trueand change this value tofalse. I guess with the new setting your backup partition should be found and create a new menu entry when you runupdate-grubagain.
– Freddy
Apr 5 at 9:19
|
show 7 more comments
I have 4 partitions on my hard disk:
- 15 GB Ubuntu OS (mounted to /) - sda 2
- 15 GB Backup (not mounted) - sda 3
- 505 MB Grub (/boot/efi) - sda 1
- 89 GB GB Data (mount /data) - sda 4
For LTS updates, e.g. 16.04 to 18.04, I want to copy (with dd) my first partition (sda2) to the second (sda3).
That way, I can do the release update on sda2 and if this fails, I have a backup on sda3.
I tried a lot of stuff to boot from sda3, but the menu entry doesn't show
up (I used update-grub).
Used dd command: dd if=/dev/sda2 of=/dev/sda3
My file /etc/grub.d/40_custom
#!/bin/sh
exec tail -n +3 $0
# 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.
menuentry "Backup"
set root=(hd0,3)
linux /vmlinuz root=/dev/sda3 ro quiet splash
initrd /initrd.img
Output of update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/50-curtin-settings.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-47-generic
Found initrd image: /boot/initrd.img-4.15.0-47-generic
Adding boot menu entry for EFI firmware configuration
done
My File /boot/grub/menu.lst
default 0
timeout 0
hiddenmenu
title Ubuntu 18.04.2 LTS, kernel 4.15.0-47-generic
root (hd0)
kernel /boot/vmlinuz-4.15.0-47-generic root=/dev/hda1 ro console=hvc0
initrd /boot/initrd.img-4.15.0-47-generic
title Ubuntu 18.04.2 LTS, kernel 4.15.0-47-generic (recovery mode)
root (hd0)
kernel /boot/vmlinuz-4.15.0-47-generic root=/dev/hda1 ro single
initrd /boot/initrd.img-4.15.0-47-generic
boot partition grub2 grub
edited Apr 5 at 18:00
fra-san
2,0271620
asked Apr 5 at 8:14
FalseFalse
63
I have 4 partitions on my hard disk:
- 15 GB Ubuntu OS (mounted to /) - sda 2
- 15 GB Backup (not mounted) - sda 3
- 505 MB Grub (/boot/efi) - sda 1
- 89 GB GB Data (mount /data) - sda 4
For LTS updates, e.g. 16.04 to 18.04, I want to copy (with dd) my first partition (sda2) to the second (sda3).
That way, I can do the release update on sda2 and if this fails, I have a backup on sda3.
I tried a lot of stuff to boot from sda3, but the menu entry doesn't show
up (I used update-grub).
Used dd command: dd if=/dev/sda2 of=/dev/sda3
My file /etc/grub.d/40_custom
#!/bin/sh
exec tail -n +3 $0
# 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.
menuentry "Backup"
set root=(hd0,3)
linux /vmlinuz root=/dev/sda3 ro quiet splash
initrd /initrd.img
Output of update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/50-curtin-settings.cfg'
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-4.15.0-47-generic
Found initrd image: /boot/initrd.img-4.15.0-47-generic
Adding boot menu entry for EFI firmware configuration
done
My File /boot/grub/menu.lst
default 0
timeout 0
hiddenmenu
title Ubuntu 18.04.2 LTS, kernel 4.15.0-47-generic
root (hd0)
kernel /boot/vmlinuz-4.15.0-47-generic root=/dev/hda1 ro console=hvc0
initrd /boot/initrd.img-4.15.0-47-generic
title Ubuntu 18.04.2 LTS, kernel 4.15.0-47-generic (recovery mode)
root (hd0)
kernel /boot/vmlinuz-4.15.0-47-generic root=/dev/hda1 ro single
initrd /boot/initrd.img-4.15.0-47-generic
boot partition grub2 grub
boot partition grub2 grub
edited Apr 5 at 18:00
fra-san
2,0271620
asked Apr 5 at 8:14
FalseFalse
63
edited Apr 5 at 18:00
fra-san
2,0271620
asked Apr 5 at 8:14
FalseFalse
63
edited Apr 5 at 18:00
fra-san
2,0271620
edited Apr 5 at 18:00
fra-san
2,0271620
edited Apr 5 at 18:00
fra-san
2,0271620
2,0271620
asked Apr 5 at 8:14
FalseFalse
63
asked Apr 5 at 8:14
FalseFalse
63
asked Apr 5 at 8:14
FalseFalse
63
63
@terdon i added now a custom menuentry.. see above...
– False
Apr 5 at 8:54
Thank you, that's much clearer now! Did you rungrub-installafterupdate-grub? If not, no new menu entry will be created if I remember correctly.
– terdon♦
Apr 5 at 9:01
In the example above i only run grub-install, the menuentry is shown in grub. But it boots the same system as the original boot entry (both sda2)
– False
Apr 5 at 9:09
What? Why didn't you mention that then? What menu entry? Please tell us all of these details, it is really tiring to have to drag them out of you bit by bit like this. The more information you give us, the better our chances of understanding and helping you.
– terdon♦
Apr 5 at 9:12
1
Please check in/etc/default/grubif there is a lineGRUB_DISABLE_OS_PROBER=trueand change this value tofalse. I guess with the new setting your backup partition should be found and create a new menu entry when you runupdate-grubagain.
– Freddy
Apr 5 at 9:19
|
show 7 more comments
@terdon i added now a custom menuentry.. see above...
– False
Apr 5 at 8:54
Thank you, that's much clearer now! Did you rungrub-installafterupdate-grub? If not, no new menu entry will be created if I remember correctly.
– terdon♦
Apr 5 at 9:01
In the example above i only run grub-install, the menuentry is shown in grub. But it boots the same system as the original boot entry (both sda2)
– False
Apr 5 at 9:09
What? Why didn't you mention that then? What menu entry? Please tell us all of these details, it is really tiring to have to drag them out of you bit by bit like this. The more information you give us, the better our chances of understanding and helping you.
– terdon♦
Apr 5 at 9:12
1
Please check in/etc/default/grubif there is a lineGRUB_DISABLE_OS_PROBER=trueand change this value tofalse. I guess with the new setting your backup partition should be found and create a new menu entry when you runupdate-grubagain.
– Freddy
Apr 5 at 9:19
@terdon i added now a custom menuentry.. see above...
– False
Apr 5 at 8:54
@terdon i added now a custom menuentry.. see above...
– False
Apr 5 at 8:54
Thank you, that's much clearer now! Did you run
grub-install after update-grub? If not, no new menu entry will be created if I remember correctly.– terdon♦
Apr 5 at 9:01
Thank you, that's much clearer now! Did you run
grub-install after update-grub? If not, no new menu entry will be created if I remember correctly.– terdon♦
Apr 5 at 9:01
In the example above i only run grub-install, the menuentry is shown in grub. But it boots the same system as the original boot entry (both sda2)
– False
Apr 5 at 9:09
In the example above i only run grub-install, the menuentry is shown in grub. But it boots the same system as the original boot entry (both sda2)
– False
Apr 5 at 9:09
What? Why didn't you mention that then? What menu entry? Please tell us all of these details, it is really tiring to have to drag them out of you bit by bit like this. The more information you give us, the better our chances of understanding and helping you.
– terdon♦
Apr 5 at 9:12
What? Why didn't you mention that then? What menu entry? Please tell us all of these details, it is really tiring to have to drag them out of you bit by bit like this. The more information you give us, the better our chances of understanding and helping you.
– terdon♦
Apr 5 at 9:12
1
1
Please check in
/etc/default/grub if there is a line GRUB_DISABLE_OS_PROBER=true and change this value to false. I guess with the new setting your backup partition should be found and create a new menu entry when you run update-grub again.– Freddy
Apr 5 at 9:19
Please check in
/etc/default/grub if there is a line GRUB_DISABLE_OS_PROBER=true and change this value to false. I guess with the new setting your backup partition should be found and create a new menu entry when you run update-grub again.– Freddy
Apr 5 at 9:19
|
show 7 more comments
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@terdon i added now a custom menuentry.. see above...
– False
Apr 5 at 8:54
Thank you, that's much clearer now! Did you run
grub-installafterupdate-grub? If not, no new menu entry will be created if I remember correctly.– terdon♦
Apr 5 at 9:01
In the example above i only run grub-install, the menuentry is shown in grub. But it boots the same system as the original boot entry (both sda2)
– False
Apr 5 at 9:09
What? Why didn't you mention that then? What menu entry? Please tell us all of these details, it is really tiring to have to drag them out of you bit by bit like this. The more information you give us, the better our chances of understanding and helping you.
– terdon♦
Apr 5 at 9:12
1
Please check in
/etc/default/grubif there is a lineGRUB_DISABLE_OS_PROBER=trueand change this value tofalse. I guess with the new setting your backup partition should be found and create a new menu entry when you runupdate-grubagain.– Freddy
Apr 5 at 9:19