I have purchased Dell Vostro 3400 laptop computer that came with Ubuntu 20.04.5 LTS preinstalled on a 1TB HDD. (it has enough free space)
Output of fdisk p command in given below:
dell@dell-Vostro-3400:~$ sudo fdisk /dev/sda
Welcome to fdisk (util-linux 2.34).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): p
Disk /dev/sda: 931.53 GiB, 1000204886016 bytes, 1953525168 sectors
Disk model: ST1000LM035-1RK1
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 78F0AD73-AA07-4A06-B90A-5461E161464E
Device Start End Sectors Size Type
/dev/sda1 2048 1794047 1792000 875M EFI System
/dev/sda2 1794048 18571263 16777216 8G Microsoft reserved
/dev/sda3 18571264 1953523711 1934952448 922.7G Linux filesystem
Ubuntu is installed and running from /dev/sda3. I want to resize /dev/sda3 and release some space so that I can install Fedora Workstation (and dual boot Ubuntu and Fedora) without losing the Ubuntu installation that came with the computer when I purchased it (as I believe it has all the appropriate device drivers, etc. and I do not want to lose them.)
What is the best way I can dual-boot this computer with Ubuntu (it came with Ubuntu) and Fedora (which I want to install) without losing the existing Ubuntu installation? (As this is a fresh machine I do not have any data here.)
When I tried to use Disks utility to resize the Ubuntu partition it says
Error unmounting filesystem
Error unmounting /dev/sda3: target is busy (udisks-error-quarks, 14)
