Parse the systemd journal with QJournalctl

Quick Plot

© Lead Image © varijanta,

© Lead Image © varijanta,

Article from Issue 254/2022

QJournalctl is a convenient GUI tool that will help you track down log data in the systemd journal.

After more than 10 years of development, systemd has undeniably arrived. The systemd system and service manager still does not find undivided approval in the open source community, but the discussions centered on what was once a very controversial topic have calmed down. No matter what you think of systemd, it has improved a few things.

One of the benefits of systemd is its ability to log information, warnings, and errors. In systemd, the component responsible for logging is known as the journal. Systemd-journald provides much more data than conventional log files /var/log/messages or /var/log/syslog that have been used for decades. In some cases, the journal even includes metadata that you can use to refine your journal searches.

Systemd's journaling results in a high volume of data that would be difficult to handle with conventional text files. Because of this high volume, systemd stores the data in binary files that can be read with the journalctl command. Various programs and services, and even the kernel, write their log entries to the journal. The systemd journal combines all these logs and offers various options for finding the information you need in a targeted way.


Use Express-Checkout link below to read the full article (PDF).

Buy this article as PDF

Express-Checkout as PDF
Price $2.95
(incl. VAT)

Buy Linux Magazine

Get it on Google Play

US / Canada

Get it on Google Play

UK / Australia

Related content

  • Journalctl

    The journal is the systemd component responsible for viewing and managing logfiles.

  • Command Line: Systemd

    Wondering what all the fuss is about systemd? We explain the basic concepts and capabilities of the new system management suite – coming soon to a distro near you.

  • Systemd Graphical Tools

    Systemd has won the race, as indicated by the several tools that already offer a service just a mouse click away. We look at six of these tools.

  • Systemd GUIs

    Graphical frontends make it easier to take full advantage of the Systemd process manager. We examine some leading tools for the KDE environment.

  • Professor Knopper's Lab – Removing systemd

    The systemd service manager has been widely adopted by many Linux distros, so why would you want to remove it? The professor reveals why and how.

comments powered by Disqus

Direct Download

Read full article as PDF:

Price $2.95