Upgrade to testing
Basically (as root):
su -
apt-get update && apt-get upgrade -y cat <<EOF >/etc/apt/sources.list deb https://deb.debian.org/debian testing main contrib non-free deb https://deb.debian.org/debian-security testing/updates main contrib non-free EOF apt-get update apt-get dist-upgrade -y apt autoremove -y
Then answer the questions.
If you enable extra architectures (see below), you might want to limit the architectures of the main repositories to amd64 (if you use that). So do this instead:
apt-get update && apt-get upgrade -y cat <<EOF >/etc/apt/sources.list deb [arch=amd64] https://deb.debian.org/debian testing main contrib non-free deb [arch=amd64] https://deb.debian.org/debian-security testing/updates main contrib non-free EOF apt-get update apt-get dist-upgrade -y apt autoremove -y
Default apt to use testing
If you are going to use multiple repos (e.g. debian-ports below), make testing the default like so:
echo 'APT::Default-Release "testing";' >/etc/apt/apt.conf.d/91prefertesting
Add support for new (hardware) ports
If you want to add support for new ports (e.g. RISC-V), do this:
apt-get install -y debian-ports-archive-keyring cat <<EOF >>/etc/apt/sources.list deb https://deb.debian.org/debian-ports unstable main deb https://deb.debian.org/debian-ports unreleased main deb https://deb.debian.org/debian-ports experimental main EOF apt-get update
Consider limiting the new ports to a specific architecture. Also consider limiting the main repositories to amd64 (if you use amd64). So do this instead:
apt-get install -y debian-ports-archive-keyring cat <<EOF >>/etc/apt/sources.list deb [arch=riscv64] https://deb.debian.org/debian-ports unstable main deb [arch=riscv64] https://deb.debian.org/debian-ports unreleased main deb [arch=riscv64] https://deb.debian.org/debian-ports experimental main EOF apt-get update