Split a text file every n number of lines

split-on-lines.sh

#!/bin/bash
# parameter 1: file to split
# parameter 2: number of lines per file

echo "About to split file $1"
echo "every $2 lines"

md5sum $1 > $1.md5

split -l $2 $1 $1.split.

gzip -1 $1.split.*

md5sum $1.split.*.gz > $1.split.gz.md5