There is the usual command for listing the systemd services:
systemctl list-units --type=service
Then there is the --user parameter for enabling and starting a user service, executing the command from a user's session:
systemctl --user enable/start <service name>
I need, as root, to list services running under a certain user, something like:
systemctl list-units --type=service --user <username>
Haven't been able to find anything about this. Is it even possible?