Planned lessonJNR-048-L07

Demo: running Shop as a systemd service

On This Lesson 3 topics

This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.

In this lesson

run the Shop JAR as a managed service. Prepares JNR-048-LAB1.

Draft outline details

Create a shop system user and copy the JAR to /opt/shop.
Write /etc/systemd/system/shop.service with User=shop, ExecStart=java -jar /opt/shop/shop.jar, Restart=on-failure.
systemctl daemon-reload, enable --now shop, then check status and journalctl -u shop.
Find the port with ss -tlnp and call the health endpoint with curl.
Planned mistake: the JAR is owned by root with mode 600, so the service fails with "permission denied"; fix with chown and chmod 640, not 777.
kill the process and show systemd restarting it.

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