File Unifier

file_unifier.sh

#!/bin/bash

FILENAME='unified/MERGED_FILENAME.txt'

`rm $FILENAME`
`touch $FILENAME`

FILES2012=`ls files/ | grep -E "FILENAME2012[0-9]{1,}\.txt"`

for file in $FILES2012; do
	cat "files/$file" >> $FILENAME;
done

FILES2013=`ls files/ | grep -E "FILENAME2013[0-9]{1,}\.txt"`

for file in $FILES2013; do
	cat "files/$file" >> $FILENAME;
done