#strip file size
# original for UNIX: s/\(.*users *\)\([0-9]*\)\( .*\)/\2/
# for CYGWIN/UNIX
s/\([a-z-]* *\)\([0-9]* *\)\([A-Za-z]* *\)\([A-Za-z]* *\)\([0-9]*\)\( .*\)/\5/