I'm very new in the Ubuntu family (I downloaded Ubuntu 12.04 LTS , just 2 days ago, I must learn Linux for college).
Second of all, English is not my native language, but I'll try to be as clear as possible).
I installed Ubuntu on a 1 GB flash drive using Universal USB Installer, following the instructions on the Ubuntu.com. It worked just fine.
So i started using the Terminal, to learn about commands, and I edited a text file, a few times, and after a few hours when I tried to save the text file again it displayed me the " low disk space .." message.
I think it also stored the Firefox history/cache.
Anyway, my question is, how can I clear the space?
Side note: while using Universal Usb, it asked me for the size of persistent folders ( or something like that) and i specified 200 MB, thinking that this is for file storage. Have I done good? Or wrong?