usage: d3 [-F field-seperator] [-p select-rule] [-f 'output-format']
options: -F  split fields at specfied pattern
         -p  print only lines on which perl select-rule is true
         -f  output format for printf
examples: du -ks * | d3 -f '%10s %s'
          df -k | d3 -p '/^[^:]* /' -f '%-18s %11s %11s %11s %8s %s'