Planned lessonJNR-048-L06

Logs and services

On This Lesson 4 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

read logs and control a service with systemd.

tail -f file follows a log live; grep filters it.
systemd runs services described by unit files in /etc/systemd/system/.
systemctl start|stop|restart|status shop manages a service; enable starts it at boot.
journalctl -u shop -f follows that service's logs; add --since "10 min ago".
In a unit file, Restart=on-failure and User=shop matter.

Draft outline details

bash

sudo systemctl status shop
journalctl -u shop --since "10 min ago"
tail -f /var/log/shop/app.log

Which command follows a service's logs?

Show answer

journalctl -u <service> -f.

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