Debian

sudo -s
mv /etc/apt/sources.list /etc/apt/sources.list.old
echo "deb http://deb.debian.org/debian sid main contrib non-free">/etc/apt/sources.list
echo "deb-src http://deb.debian.org/debian sid main contrib non-free">>/etc/apt/sources.list
cat /etc/apt/sources.list
apt update && apt dist-upgrade -y && apt autoremove -y && apt clean -y && reboot