Split file into parts containing at most given number of lines.

split.sh

#!/bin/bash

file=$1
lines=$2

sumLines=$(wc -l $file | cut -f1 -d' ')

processed=0
part=1

while [ $processed -lt $sumLines ]
do
    startLine=$[processed+1]
    endLine=$[processed+lines]
    processed=$endLine
    if [ $endLine -gt $sumLines ]; then
	endLine="\$"
    fi
    sed -n -e "$startLine,$endLine p" $file > $file.p${part}
    part=$[part+1]
done