I just checked how much free space I have left on my hard disk using
:~$ free -t
total used free shared buffers cached
Mem: 4063056 1075744 2987312 0 65064 551704
-/+ buffers/cache: 458976 3604080
Swap: 4124668 0 4124668
Total: 8187724 1075744 7111980
But how is it possible that I have only 7 GB left while my hard disk is 320Gb?
Also, how can I make space easily and safe?