The last shift is coming to an end...

Always choose the right tools for the right thing. Trying to figure out how much quota the users of our computing room need, I ended up doing
du -sh /home/s*/???????? | awk {"print $1"} > disk_usage, then analyze this with a full blown root-analysis[1]. They use average of 24 MB, some up to 180MB, most of them less then 20. Plot available on request ;-)

Maybe I will program a script like "if over quota call shooting squad" ;-)

[1] For those not in physics: root is a tool to analyze data from particle accelerators...