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So I dual boot installed Ubuntu even though it is not dual boot (I cannot choose), apparently the second install is a mistake, so I wanna resize it but I can't, please help I did not know what to do

  • So how do I delete it in live Ubuntu?
  • Does deleting the grub_bios partition risky?
  • Do I have to clone Ubuntu then delete these 2 drives
  • Do I have to get fresh installation which is a lot to prepare for my programming needs,
  • Do I have another suggestion, please? Thank you

This is my drive from GParted software

img_GParted

Mir Rahed Uddin
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Nurjamil
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2 Answers2

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You don't need to use a live Ubuntu.

Deleting the grub_bios partition is risky, don't do this when your PC has no UEFI-BIOS but only an "old" BIOS. I suggest, just don't touch that partition, even when you have an UEFI-BIOS.

You don't need to clone, but making backups is always a good idea, when possible.

A fresh installation would be best.

What you can do to delete the old Ubuntu is:

  • boot your regular Ubuntu, the one you want to keep
  • open a terminal and type sudo -i and hit ENTER, this gives you root rights
  • make a backup of your fstab by typing cp /etc/fstab /etc/fstab.bak and hit ENTER
  • edit fstab by typing nano /etc/fstab and hitting ENTER
    • find the unwanted partitions within the fstab config and delete their entries
    • press CTRL+O for saving the changes to file
    • press CTRL+X for quitting the editor
  • reboot your system (the same system)
  • open another terminal and give you again root rights by typing sudo -i and hitting ENTER
  • type parted into terminal and hit ENTER, this starts the partition manager
    • be very careful when using parted, it's an interactive program, all changes are instant!
    • type help and hit ENTER to get a command help list
    • type print devices and hit ENTER to see all storage devices
    • search for the storage device (probably harddisk /dev/sda) you want to change
    • type select /dev/sda and hit ENTER to select your desired storage device
    • type print free and hit ENTER to display partitions of your selected storage device
    • CAREFULLY! type rm NUMBER, where NUMBER is the number of the partition you want to delete and hit ENTER - (double check your typing!)
    • type print free and hit ENTER to verify your changes
    • OPTIONAL: type resizepart and hit ENTER to adjust partition size of the remaining partitions, make sure to only increase the size of your partitions, don't decrease the size of your partitions! You can only resize partitions which are not mounted, so maybe a live Ubuntu would do better here.
    • type quit and hit ENTER to quit parted
  • type update-grub in terminal and hit ENTER (this updates the boot menu)
  • reboot your system
paladin
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The bios_grub is onlyd needed when you want to install Ubuntu in legacy mode on a disk with GPT partition table.

Your disk obviously has a GPT partition table. Since Windows boot mode is bound to the partition table type (GPT>UEFI-mode, msdos>legacy-mode), your Windows is installed in UEFI-mode.

To achieve a proper dual-boot, you have to install Ubuntu in the same boot-mode as Windows (also Windows fast-startup feature must be turned off), thus you have to install Ubuntu in UEFI-mode. In UEFI-mode, the bios_grub-partition is not needed and you could delete it before you reinstall.

I'd recommend to disable legacy boot (sometimes called CSM) in your UEFI/Bios-settings, so you can't boot in the wrong boot-mode accidentally, how you boot is how you install.

I converted my legacy install into an UEFI install a few years ago without reinstalling the OS, here is how I did it.

mook765
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