treesize.sh

 #/bin/sh
 du -k -d 1 | sort -nr | awk '
      BEGIN {
         split("KB,MB,GB,TB", Units, ",");
      }
      {
         u = 1;
         while ($1 >= 1024) {
            $1 = $1 / 1024;
            u += 1
         }
         $1 = sprintf("%.1f %s", $1, Units[u]);
         print $0;
      }
     '