Let's say that you have a bunch of servers that you admin en masse using Ansible.  You have all of them listed and organized in your /etc/ansible/hosts file.  Let's say that each server is running a system service (like my Systembot) running under systemd in --user mode.  (Yes, I'm going to use my exocortex-halo/ repository for this, because I just worked out a good way to keep everything up to date and want to share the technique for everyone new to Ansible.  Pay it forward, you know?)  You want to use Ansible to update your copy of Systembot …