harddisk fullness %74
 

My root is mounted on hda2 9GB and
ls -alh
drwxr-xr-x 19 root root 472 Jul 20 15:24 ./
drwxr-xr-x 19 root root 472 Jul 20 15:24 ../
drwx------ 2 root root 48 Jun 22 22:39 .reiserfs_priv/
drwxr-xr-x 2 root root 248 Jul 16 17:13 backup/
-rw-r--r-- 1 root root 40K Jul 20 15:24 backup.tar
drwxr-xr-x 2 root bin 2.4K Jun 1 18:27 bin/
drwxr-xr-x 2 root root 368 Jun 22 20:22 boot/
drwxr-xr-x 15 root root 61K Aug 5 11:54 dev/
drwxr-xr-x 46 root root 4.7K Aug 5 14:03 etc/
drwxr-xr-x 5 root root 120 Jun 8 21:22 home/
drwxr-xr-x 4 root root 2.6K Jun 1 18:26 lib/
drwxr-xr-x 5 root root 120 Mar 16 2002 mnt/
drwxr-xr-x 4 root root 96 Sep 15 2003 opt/
dr-xr-xr-x 57 root root 0 Aug 5 14:54 proc/
drwx--x--- 7 root root 464 Jul 20 15:31 root/
drwxr-xr-x 2 root bin 5.6K Sep 2 2003 sbin/
drwxrwxrwt 4 root root 112 Aug 17 03:04 tmp/
drwxr-xr-x 17 root root 520 Aug 2 10:26 usr/
drwxr-xr-x 16 root root 456 Aug 15 2003 var/

I dont understand why my hda2 partition is %74 full what ruins it?
Please help me.

use this

list all files in Kb

du -k --max-depth=1