#!/bin/sh
cp /etc/apt/sources.list /etc/apt/sources.list.bak \
    && sed -i "s|http://deb.debian.org/debian|${REPO_URL}/debian|g" /etc/apt/sources.list \
    && sed -i "s|http://security.debian.org/debian-security|${REPO_URL}/debian-security|g" /etc/apt/sources.list \
    && sed -i '/debian-security/d' /etc/apt/sources.list

echo "Done."
cat /etc/apt/sources.list