army_checker

#!/bin/bash

MD5_OLD=_$(md5sum 'path_to_temp_output' | cut -d ' ' -f 1)

curl -X POST -d @/path/to/config/file 'http://www.stratologia.gr/proepiskophsh_stoixoivn' | grep -A 3 enhmKatataxisDiv > path_to_temp_output

MD5_NEW=_$(md5sum 'path_to_temp_output' | cut -d ' ' -f 1)

if [ "$MD5_OLD" != "$MD5_NEW" ]
then
  cat path_to_temp_output | mail -s 'ARMY update' the_email
fi

config file example

asg=666&asm=666666&klash=6666&lastname=Έξιέξιέξι&firstname=Έξιέξι&yearofbirth=666&mode=katataxi