How to remove a second Ubuntu install?
Solution 1
Boot in to Ubuntu installation that you want to keep. Delete the partitions for the other Ubuntu install and run update-grub.
So if you want to keep your old linux installation and get rid of the one you installed later, just boot into your old linux installation and start gparted or disk-utility (which ever you like). From there delete sda4, sda5, sda6, sda7 and sda8 i.e all the partitions you created for new installation of Ubuntu. Now open terminal and run sudo update-grub
. This will update the grub and remove the other Ubuntu install from the grub startup screen.
Solution 2
You can perform the following steps:
comment out the lines for sda1 and sda3 in your /etc/fstab. this prevents them from being mounted.
reformat (and maybe even repartition) the two partitions. However, merging them will most likely only work, if they are stored physically behind each other on the disk.
invoke update-grub to make grub refresh its menu.
But be careful, your computer seems to boot from sda1. Depending on how you installed the second ubuntu, you might have to mark the new root / boot partition as bootable.
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moraes
Updated on September 18, 2022Comments
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moraes over 1 year
I installed Windows XP in dual-boot with Ubuntu to play Skyrim and that ended up breaking GRUB. After trying zillions of things to fix it (including using boot-repair), I installed Ubuntu in a new partition, side-by-side with the old Ubuntu and XP. After that GRUB worked again and I can now access my old Ubuntu and XP, but now I have two Ubuntus and I want to drop the new one. How do I do that without breaking GRUB again?
Here's the result for
sudo fdisk -l
:Device Boot Start End Blocks Id System /dev/sda1 * 1 17303 138986316 83 Linux /dev/sda2 19799 29359 76798732+ 7 HPFS/NTFS /dev/sda3 29360 30401 8369865 82 Linux swap / Solaris /dev/sda4 17304 19798 20040705 5 Extended /dev/sda5 17304 17595 2343936 83 Linux /dev/sda6 17595 18811 9764864 83 Linux /dev/sda7 18811 19677 6952960 83 Linux /dev/sda8 19677 19798 975872 82 Linux swap / Solaris
sda1
andsda3
are my old Ubuntu,sda2
is Windows XP, andsda4
tosda8
are the new Ubuntu install (I created different partitions for/boot
,/
and/home
, should not have done that just to fix GRUB).And
/etc/fstab
looks like this:# <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 # / was on /dev/sda1 during installation UUID=e41d0403-82db-4379-9d3e-b67cb06fc08d / ext4 errors=remount-ro 0 1 # swap was on /dev/sda5 during installation UUID=5a54507a-82f0-4275-b531-f88b9cfabbcb none swap sw 0 0
And here is the report from Boot-Repair:
http://paste.ubuntu.com/740188/
And here is the list from
/dev/disk/by-uuid
:ubuntu@ubuntu:~$ ls -la /dev/disk/by-uuid total 0 drwxr-xr-x 2 root root 140 2011-11-16 13:21 . drwxr-xr-x 6 root root 120 2011-11-16 13:19 .. lrwxrwxrwx 1 root root 10 2011-11-16 13:19 11F7-4048 -> ../../sdb1 lrwxrwxrwx 1 root root 10 2011-11-16 13:19 40b84b5c-dd62-4267-a41c-e5afc0c178a4 -> ../../sda3 lrwxrwxrwx 1 root root 11 2011-11-16 13:19 82672ddd-82ac-4d41-98c2-fc359f248f3b -> ../../loop1 lrwxrwxrwx 1 root root 10 2011-11-16 13:21 DE34ED7A34ED5655 -> ../../sda2 lrwxrwxrwx 1 root root 10 2011-11-16 13:21 e41d0403-82db-4379-9d3e-b67cb06fc08d -> ../../sda1
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jrg over 12 yearsDid you install it via Wubi?
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moraes over 12 yearsNo, I just created a new partition, booted from Windows CD and installed it.
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moraes over 12 yearsI mean, I never used Wubi I think. Ubuntu is my main OS, and I installed it using the distribution from ubuntu.org. Windows came only these days.
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Michael K over 12 yearscan you add the output of ls -la /dev/disk/by-uuid please? You have two swap partitions, which is unusual.
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moraes over 12 years@MichaelK I updated it with that info. I created a second swap for the second Ubuntu install. But I no longer have it, as I deleted the partitions sda4,sda5,sda6,sda7,sda8 following previous answers. I also added the output from Boot-Repair, got while I am on the live-USB.
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Michael K over 12 yearsyes now you need to change your fstab to use the correct swap partition, else it cannot be mounted during boot. just replace the uuid in the swap line of the fstab by the uuid of sda3 you got in the output of by-uuid (5c-dd62-4267-a41c-e5afc0c178a4)
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Michael K over 12 yearscan you as well say, where the boot process stops? What messages are printed on the screen? Maybe a screenshot? By the way, grub2 can also be configured the way that it performs a quiet boot.
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moraes over 12 yearsRe: where the boot process stops. It doesn't even start, it seems. All that appears in the screen is: "error: no such partition. \n grub rescue>" and a prompt. I'd learn how to take a screenshot from command line but there's nothing more than that, really. I'll try to change fstab now.
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moraes over 12 years
sda1
andsda3
are the ones I want to keep, so I'll take that you meansda4
tosda8
. These latter ones are all close to each other in the disk, and I can merge tosda1
in the end (the space was taken fromsda1
for the new Ubuntu install). -
moraes over 12 yearsI updated the question with the contents of
/etc/fstab
. I'm not sure if I have anything to comment out from there. When I runupdate-grub
, it finds the new Ubuntu on/dev/sda6
. I need to discover how to make GRUB ignore that one. -
Michael K over 12 yearsah okay... well the change in fstab is only necessary to prevent your new linux from trying to mount a partition which you later delete. This is not the case for you. So now you can remove (delete) the partitions of the linux installation you want to remove and invoke update-grub. (update-grub will detect both linux versions as long as both are present) However, if you were to delete sda1 you would run into trouble.
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moraes over 12 yearsI did that. Deleted partitions from new Ubuntu using gparted, then ran
update-grub
. Now I'm on the Live CD because GRUB got borked again. :-( -
moraes over 12 yearsFor some reason that did not work. I deleted the partitions, ran
update-grub
and restarted. GRUB is borked again and I am on the Live CD. -
binW over 12 yearsthe above link is for grub2 and the step 13 i.e "Reinstalling GRUB 2 from LiveCD" is the one you need to follow. In case you a version of Ubuntu with Grub (not Grub2) then you can use the steps mentioned at ubuntuforums.org/showthread.php?t=224351 to reinstall grub
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moraes over 12 yearsThank you, sir. And to everybody who helped. I'm back to my old Ubuntu and the new one is finally gone. :)