how to switch user within a systemd service using 'User=' directive on Debian 11
I'm learning this framework and I'm dealing with I'm confused about I'm trying to run a systemd service as a specific user on my Debian 11 server, but the service fails to start due to permission issues when using the 'User=' directive in the service file. The service file is configured as follows: ```ini [Unit] Description=My Example Service [Service] Type=simple User=myuser ExecStart=/usr/bin/myapp [Install] WantedBy=multi-user.target ``` When I attempt to start the service using `sudo systemctl start myservice`, I receive the following behavior: ``` Failed to start myservice.service: Unit myservice.service failed to load due to invalid argument. ``` I have confirmed that `myuser` exists and has the necessary permissions to execute `/usr/bin/myapp`. Additionally, I checked the logs using `journalctl -xe` and found: ``` myservice.service: Failed to determine user credentials: No such process ``` I’ve tried changing the permissions of `/usr/bin/myapp` and even running it directly under `myuser` using `sudo -u myuser /usr/bin/myapp`, which works fine. However, it seems that systemd want to switch to `myuser` when starting the service. I also confirmed that my user is not part of any restrictive groups that would prevent it from being used by systemd. Is there something I might be missing in the configuration or a specific requirement for the 'User=' directive in systemd? This is part of a larger CLI tool I'm building. Am I missing something obvious? For context: I'm using Shell on macOS. Am I missing something obvious? My development environment is Windows 11.