Shell Programming and Scripting

for filename in `find . -name *blah*`;
do
  new_name=`echo $filename | sed -e "s/blah//g" $filename`
  mv $filename $new_name
done

20111111_DATA_ABC_ABC_DEF_END1.bin
20111111_DATA_BCD_EDF_AAS_END2.bin

20111111_DATA__END1.bin
20111111_DATA__END2.bin

  find . -name "*stuff* | awk '
    {
        n = split( $1, a, "_" );
        printf( "mv %s %s_%s__%s\n", $1, a[1], a[2], a[n] );
    }
  ' # ksh    ### remove the comment before ksh after you verify that the commands generated are what you want.

echo 20111111_DATA_ABC_ABC_DEF_END1.bin |awk '{print $1,$2,$NF}' FS=_ OFS=_

20111111_DATA_END1.bin