I installed both Ubuntu 16.04 and Windows on my Laptop, but on different disk partitions.
I accidentally used up all space on the Linux disk when I set up a PostgreSQL database on it, and tried to import ~30GB data into it (the file might expand). Now my Ubuntu 16.04 cannot even start properly. e.g. I cannot even start terminal, and the Unity desktop does not show applications. After logging in my user, I basically cannot do anything.
So I booted from Windows and thought I might be able to free up space on the Linux disk from this system. But I'm not sure how. Windows seems to be working fine now, but I'm not sure if it will break later.
Any advice on this? Thanks!