/ (root) partition full

[Gordon R. Keehn]

Hi, Anyone
    Before we left for the Christmas holiday, I powered down my FC4 box. 
  (My wife is paranoid that way.)  KDiskFree showed my root partition a 
bit over 50% full.  Within hours of starting it up again a few days ago, 
it was pushing 100%, and I haven't been able to find the culprit.  The 
file system is reiserfs (I installed FC4 over an old SuSE distro), if 
that makes a difference.  Has anyone run into this?  Is there a tool I 
can use to report the space occupied by each folder, to try to identify 
the cause?  I've deleted some old stuff from /var and /tmp, but that 
only recovered about 350 mB;  I'm still missing some 5 gig.
    Cheers,
Gordon Keehn