Human-readable disk usage, sorted in ascending order by size

disk_usage.sh

du -sk * | sort -n | while read size fname; \
do for unit in k M G T P E Z Y; 
  do \
    if [ $size -lt 1024 ]; \
      then echo -e "${size}${unit}\t${fname}"; \
      break; \
    fi; \
    size=$((size/1024)); \
  done; \
done