$ sudo du -sh /*
4,6M    /bin
55M     /boot
0       /cdrom
136K    /dev
16M     /etc
5,9G    /home
4,0K    /initrd
0       /initrd.img
0       /initrd.img.old
503M    /lib
48K     /lost+found
16K     /media
4,0K    /mnt
21M     /opt
903M    /proc
688K    /root
9,9M    /sbin
20K     /scratch
4,0K    /srv
0       /sys
13M     /tmp
3,4G    /usr
2,0G    /var
0       /vmlinuz
0       /vmlinuz.old