I have struggled with my problem for days, and have tried to find different kind of solutions, but now I decided to ask.
My primary problem is too small sda1 partition which is 243M and 100% full. Sda2 which includes sda5 is the rest 148.8G
Gparted booted from USB shows that sda5 is full, thus won't let to decrease it's size.
However the sda5 uses really only about 21G, showing 14% when using #df -h
I have extra drive (80G) where I installed another Ubuntu, and I have mounted the old sda5 to get files from there.
Now my secondary problem is, that I can't find out how to resize the original sda5 from terminal. I think it can be done because it really isn't full (as gparted thinks it is), and it doesn't have to be mounted because it's secondary drive when the machine is booted from extra drive.
I can't get some info (like df -h) from the original drive, because the machine is and has to be booted from secondary right now, but I will do my best to get as much extra info as possible.
Thank you in advance!
Additional info: The primary disk I'm trying to get to work is Ubuntu Server 12.04 The secondary disk is using Ubuntu 14.04
Primary disk's sda5 is LVM
gnome-disks
.