How many time did you try to know exactly which is the living-to-eat-some-space directory on your hard drive?
No matter what system/distro you have, that could be a issue for you as a faithful user of Ubuntu, OpenSuSE, Slackware, Gentoo and so on.
Either you have a unique partition or a multi partition system the following code might be useful for your purpose.
user@pc:~$ du -S | sort -n
Have a try and reclaim your free space!
