On 11/7/24 14:19, Chris Green wrote:
I'm particularly interested in a way to run (say) Debian Bullseye within my Debian Bookworm system. I'm looking for something slightly 'lighter weight' than a full-blown virtual machine like virtualbox though I guess I can use virtualbox if I have to.
I do this a lot, running all kind of Debian and Ubuntu versions on my Sid host. I'm using LXC (the old one, in package lxc, not the new one that comes in package lxd). LXC gives you a full system, including (typically) systemd. Docker is good at running a single program (typically servers, but I also run browsers in docker containers). I couldn't get CentOS 7 running inside LXC, probably because the kernel was too different, so I had to use a full VM (KVM) for this. Detlef