Viewing Logs for a systemd Unit with journalctl
When running systemd, the journal stores all the logs that are associated with the various services running under it.
This means that if you want to have a quick look through you'll likely have a lot of noise for other services, which may make it harder to find what you're looking for. If you know the unit you're looking to get the logs for, i.e. micropub.service, you can run the following:
$ journalctl -u micropub.service
-- Logs begin at Sat 2019-09-21 17:18:35 CEST, end at Sun 2019-09-22 10:46:25 CEST. --
Sep 21 18:24:43 www-api java[5513]: 2019-09-21 18:24:43.593 WARN 5513 --- [nio-8080-exec-1] o.s.web.servlet.PageNotFound : Request method 'GET' not supported
Sep 22 08:21:51 www-api java[5513]: 2019-09-22 08:21:51.063 ERROR 5513 --- [nio-8080-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception
Sep 22 08:21:51 www-api java[5513]: java.lang.IllegalArgumentException: Error when fetching token endpoint (unauthorized): The token provided was malformed
Sep 22 08:21:51 www-api java[5513]: at me.jvt.www.api.micropub.security.IndieAuthAuthenticationResolver.resolveAuthenticationFromToken(IndieAuthAuthenticationResolver.java:36) ~[classes!/:na]
