Re: whats the terminal command line to see how much harddrive space you have left?
2 things
1: If you don't know what something does, it's usually better to find out what it does before you run it (not to say anyone has given you bad info on this thread). A so you know what is happening and B so you can change the command to your needs if it isn't just right.
2: man pages are your friend
"Always be wary of any helpful item that weighs less than its operating manual." - Terry Pratchett