I switched from Windows to Linux (Ubuntu) a few months ago and decided that it'd be a good idea to delete my Windows partition, which I did using the Disks application on Ubuntu.
However during the transition I made the Linux partition only 80 GB big and now I am stuck with 399 GBs of space just laying around.
I don't have a USB or a CD/DVD and I was wondering if I can install Linux from Linux or if there is a way to make use of the free space and save my files there.
I noticed that there is a related post here but as far as I understand this is a Windows only tutorial.
Here is what my Disks application looks like and I have a UEFI system.
Thanks in advance.
gparted
to edit the partition table and resize the partition (though if that doesn't work we'll have to walk through it on the command line)