Using knoppix apt repository with current packages
Knoppix is based on an old Debian Bullseye which is not the current stable repository.
Therefore it needs to be slightly adjusted after booting to be able to install new packages, here is a short howto for fast copy&paste:
cp /etc/apt/sources.list /etc/apt/sources.list.bak cat >/etc/apt/sources.list <<'EOF' deb http://deb.debian.org/debian bullseye main contrib non-free deb http://deb.debian.org/debian bullseye-updates main contrib non-free deb http://security.debian.org/debian-security bullseye-security main contrib non-free EOF apt-get update cd /tmp wget http://deb.debian.org/debian/pool/main/d/debian-archive-keyring/debian-archive-keyring_2021.1.1+deb11u1_all.deb dpkg -i debian-archive-keyring_2021.1.1+deb11u1_all.deb apt-get update
System programmer