Danke dingsbums, jetzt aber:
$ sudo du / --max-depth 5 --exclude /mnt --exclude /media --exclude /home --exclude /sys --exclude /proc --exclude /dev --exclude /tmp --exclude /run | sort -nr | head -n 30 26884536 / 12453960 /usr 7535016 /lib 6819768 /lib/modules 4410932 /usr/lib 3920196 /usr/src 3679992 /usr/share 2753072 /opt 2399240 /boot 2097572 /usr/lib/x86_64-linux-gnu 1672352 /opt/d-s 1672348 /opt/d-s/DS 1658640 /var 1084496 /opt/d-s/DS/Libraries 958548 /usr/share/fonts 891800 /var/lib 762728 /opt/libreoffice6.4 680020 /var/cache 655480 /lib/firmware 527352 /usr/share/fonts/truetype 517360 /usr/share/locale 439976 /usr/share/fonts/truetype/noto 415516 /opt/d-s/DS/APS 393468 /usr/share/fonts/opentype 388216 /usr/share/fonts/opentype/noto 366124 /opt/libreoffice6.4/program 349756 /usr/bin 345424 /opt/libreoffice6.4/share 306096 /usr/lib/jvm 291132 /usr/share/doc $