Rename a set of files in a directory

batch-rename.sh

#!/bin/bash

#
# Batch rename assignment submission files.
#	Input format: PA1 Submission_username_attempt_2014-02-06-14-05-19_tp.cpp.zip
#	Output format: pa1_username.zip
#	Accepted file formats: zip and gz
#

USAGE_MESSAGE="Perform a batch rename or all submission files in a directory.
Usage:
	$0 "
FILES="*.gz *.zip"

for i in $FILES
do
	new_name=$(echo "$i" | sed 's/\(.*\)\ [S|s]ubmission_\(.*\)_.*_.*_.*\.\(.*\)$/\L\1_\2.\3/')
	echo "mv '$i' '$new_name'"
	mv "$i" "$new_name"
done