I am running a Dell XPS 13 7390, dual boot with Windows 10 and Ubuntu 18.04
Apparently when I first set it up I absent-mindedly allotted far too little space for my / dir, 10GB. Only 3 months in and I'm running out of space.
I can't resize the partition (AFAIK) form inside Ubuntu since it is mounted.
I can't seem to do so from Windows either. Windows Disk Manager only recognizes NTFS, not ext4. I am hesitant to trust third-party software, but I tried one called DiskGenius following these instructions, and I got a message that there were partition errors that needed to be fixed first, and suggested that the entire disk was damaged... Hopefully not as it's a brand new computer, and both OS run just fine.
I can't seem to use a live USB either! Instead of booting from the USB, I get greeted with a "Preboot Check" for Windows, and all the BIOS settings I have played with (like turning off Secure Boot) make no difference here. For the briefest of moments before it goes into preboot check, I see the message:
Failed to open \EFI\Boot\grubx64.efi - Not Found
Failed to load image \EFI\Boot\grubx64.efi: Not Found
start.image() returned Not Found
Thus far all searches for that error message suggest making a live USB as a solution to fix a broken OS, not about fixing a (possibly?) broken live boot.
ALL I WANT is to resize my / directory to have 25 GB instead of 10. But I don't seem to have a way to do this that does not give me some error. I am not sure what the problem to get around is!
What is the best way to get unblocked here? Should I just start downloading a bunch of random 3rd-Party window programs until one of them works? That seems risky... Could the USB image have gotten damaged? It worked 3 months ago when I installed Ubuntu with it!
EDIT: Was able to use Live USB afterall - one for gParted and not all of Ubuntu, perhaps that one just got corrupted since I used it last somehow
