sed -Ei 's/^# deb-src /deb-src /' /etc/apt/sources.list
See also[edit]
apt update, add-apt-repository, apt -qq update -y && apt -qq upgrade -ysed, gsed, -n, -i, Ansible: replace, append, Chef: Editing a file, lineinfile/etc/apt/, /etc/apt/sources.list.d/, deb, sources.list
