Partitions a file into X different parts to reduce the file size. Partitions can be concatenated back together by placing them in the same directory and running cat * > originalFile.

partition.sh

#!/bin/bash
file="$1"
num=$2
size="$(wc -c < $file | tr -d '[[:space:]]')"
count="$(expr $size / $num)"
count="$(expr $count + 1)"
for k in $(seq 1 $num); do
	i="$(expr $k - 1)"
	n="$(expr $i \* $count)"
	name="$(echo $file)_file_part_$k"
	echo "Writing $count bytes to $name starting at $n"
	dd if=$file of=$name bs=1 count=$count skip=$n
done