#! /bin/bash 
# Last edited on 2014-06-24 14:02:21 by stolfilocal
 
curdate="2014-06-24"  # Date of most recent ".sdf" index of cratera.

cat all-files-${curdate}.sdf \
  | sort \
  > .cratera-srt.sdf

cat \
    all-files-HCGL-ExtHD-2013-03-30.sdf \
    all-files-HCGL-ExtHD-2013-05-16.sdf \
    all-files-HCGL-ExtHD-new-2013-12-20.sdf \
  | sort | uniq \
  > .hcgl-srt.sdf
  
bool 1-2 .cratera-srt.sdf .hcgl-srt.sdf > .nonsaved.sdf