edit N random files

edit.sh

#!/bin/bash

if [ -z "$1" ]
then
    echo "usage: $0 N"
    exit 1
fi

N=$1
files=$(find /home/passifist/linux-2.4.29 | grep "\.[ch]")
files=$(shuf --echo $files)
arr=($files)
sliced=("${arr[@]:0:$N}")
for file in "${sliced[@]}"
do
    echo -e "\n// MY COOL EDITS" >> $file
done