How to unmount read-only file system and resize it. Ubuntu 22.04

Question

I need to resize /dev/nvme0n1p1 partition because it takes almost all memory from my SSD. And also I couldn't make dual boot for Windows as second OS, so I need help.

I've tried this commands to change read-only files to read-write, but just don't understand why it didn't make any changes.

sudo mount -o remount,rw /
sudo mount -o remount,rw /dev/nvme0n1p1

also this commands

sudo fsck.ext4 -f /dev/nvme0n1p1 
sudo mount -vo remount,rw /

I couldn't provide screenshots from Gparted app yet, because I just create my account, it displays this massege while I tried unmount the partition manualy...

Could not unmount /dev/nvme0n1p1 
#unmount -v '/'
unmount:/:target is busy

Thanks for any help guys

Here the output of this command sudo fdisk -l

Disk /dev/loop0: 4 KiB, 4096 bytes, 8 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop1: 55.66 MiB, 58363904 bytes, 113992 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop2: 61.89 MiB, 64901120 bytes, 126760 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop3: 74.11 MiB, 77713408 bytes, 151784 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop4: 155.63 MiB, 163188736 bytes, 318728 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop5: 262.09 MiB, 274821120 bytes, 536760 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop6: 349.7 MiB, 366682112 bytes, 716176 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop7: 248.76 MiB, 260841472 bytes, 509456 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/nvme0n1: 953.87 GiB, 1024209543168 bytes, 2000409264 sectors
Disk model: Timetec MS10

Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 847731F5-0940-469A-9630-B5819D5EFCF6
Device           Start        End    Sectors   Size Type
/dev/nvme0n1p1    2048    1050623    1048576   512M EFI System
/dev/nvme0n1p2 1050624 2000408575 1999357952 953.4G Linux filesystem
Disk /dev/loop8: 496.98 MiB, 521121792 bytes, 1017816 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop9: 81.26 MiB, 85209088 bytes, 166424 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop10: 91.69 MiB, 96141312 bytes, 187776 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop11: 45.86 MiB, 48087040 bytes, 93920 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop12: 12.32 MiB, 12922880 bytes, 25240 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop13: 40.43 MiB, 42393600 bytes, 82800 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop14: 284 KiB, 290816 bytes, 568 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop15: 452 KiB, 462848 bytes, 904 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/loop16: 659.28 MiB, 691302400 bytes, 1350200 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes

This solutions is for other issues. actually I need to make read-only file system read-write, because it is not possible to resize read-only files — David Gyulinyan, Feb 03 '24 at 16:58
Your SSD has two partitions, one with EFI, and other with Linux system / (root) partition. You are trying to unmount your system partition from the system you are booted into, you should instead be using a Live Environment like booting from a USB stick. Then the process is well described in the answer: https://askubuntu.com/a/18525/212123 — rusty, Feb 03 '24 at 17:17
You need to download a .ISO image of Ubuntu desktop, backup your data (just in case), flash it to a USB stick, boot up, launch Gparted app and resize. — rusty, Feb 03 '24 at 17:22
I did it before ask about it here but got this message Could not unmount /dev/nvme0n1p1 #unmount -v '/' unmount:/:target is busy — David Gyulinyan, Feb 03 '24 at 17:30
That shouldn't have been mounted in the live environment! Are you sure you've booted using live USB and not mounted that SSD partition manually? — rusty, Feb 03 '24 at 17:33
Yes ventoy can be used to prepare your USB stick to make it bootable, then you copy the .ISO file to the USB stick's partition and boot with the stick. — rusty, Feb 03 '24 at 17:43

How to unmount read-only file system and resize it. Ubuntu 22.04

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