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--- doc:appunti:hardware:software_radio [2026/02/23 09:15] – created niccolo
+++ doc:appunti:hardware:software_radio [2026/02/23 11:22] (current) – [User's systemd] niccolo
@@ Line 1: / Line 1: @@
 ====== Software IP radio and podcast player ======
+===== User's systemd =====
+When using the **systemd** command with the **%%--user%%** option to install units by the unprivileged user, the environment must have the variables **$DBUS_SESSION_BUS_ADDRESS** adn **$XDG_RUNTIME_DIR** defined. In a Debian 13 Trixie system these variables are initialized if you login on a virtual terminal or if you login remotely via ssh. They are not defined if you execute **su - username**.
+Ho to test if a script can run as a systemd user service:
+<code>
+systemd-run --user --scope --unit=test-debug /home/radio/radio/radio-backend
+</code>
+To read the service log (stdout redirected to journal by systemd):
+<code>
+journalctl --user -u radio-backend.service
+</code>