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KSystemLog is a KDE application for viewing Linux system and service logs in a graphical interface. It organizes logs into categories and makes them easier to inspect with severity colors, tabs, sorting, filters, and automatic display of new lines. You can install it through Discover or your distribution’s package manager; opening protected logs may require administrator privileges.

What is KSystemLog?

KSystemLog is a graphical system-log viewer for Linux, developed by KDE. KDE’s handbook describes it simply as “a system log viewer tool by KDE.” It is intended to make log files more approachable for beginners while giving experienced users a way to investigate problems on their systems or servers. The project is licensed under GPL-2.0-or-later.

Instead of opening log files as plain text one by one, KSystemLog presents them in a structured interface. Its categories include common logs such as the general system log, authentication, kernel, and X.org logs, with optional service logs such as Apache and CUPS. The available logs depend on what is installed and configured on your Linux system.

What can you do with KSystemLog?

  • Scan messages by severity: Log lines are colorized by severity to help distinguish more urgent messages from routine entries.
  • View several logs at once: A tabbed interface lets you keep multiple logs open.
  • Watch for new entries: KSystemLog can automatically display newly logged lines.
  • Inspect individual entries: The application provides detailed information for each log line.
  • Sort and filter: Sort a log by clicking a column heading; click it again to reverse the order. Type in the filter bar to narrow results, and choose a field such as Process to target a particular program.

KDE UserBase also documents actions such as saving, copying, and printing log entries, as well as support for several log families. That page was last edited in 2019, so those details should be treated as supporting historical information rather than a guarantee that every parser or action appears in every current build.

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How to open and filter logs

Open a log

  1. Install KSystemLog using Discover or your Linux distribution’s package manager.
  2. Launch KSystemLog. On startup, it tries to open the System Log.
  3. If you need a different log, choose it through the application’s settings or log selection controls.

Linux log files are commonly stored under /var/log. Many are restricted to administrator or privileged users, so KSystemLog may not be able to display every log when launched as a normal user. If access is denied, use your distribution’s supported method for granting administrative access rather than changing file permissions indiscriminately.

Find messages from a process

  1. Open the log you want to inspect.
  2. Click the filter bar and enter a term to narrow the displayed entries.
  3. If the interface offers a field selector, select Process to limit the match to that column rather than searching all columns.

Click a column heading to sort by that field. Click it a second time to switch the sort direction.

Installation, version, and compatibility

KDE lists KSystemLog as installable on Linux through Discover or a distribution package manager. The KDE Applications page lists version 26.08.1, released on September 10, 2026. KDE neon’s AppStream metadata, updated September 22, 2026, also identifies stable version 26.08.1 and the application ID org.kde.ksystemlog, with the executable named ksystemlog. Package availability and the version offered can vary by distribution and its repositories.

KSystemLog is software, not a hardware product, and no separate accessory is required. For current installation details and release information, see KDE’s KSystemLog application page. The application’s usage documentation is in the KSystemLog handbook.

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When KSystemLog is a good fit

KSystemLog is useful if you prefer inspecting Linux logs in a desktop application, want to browse several log categories, or need a visual filter for finding messages from a process. It complements command-line tools rather than replacing every log workflow: your choice depends on whether you prefer a graphical or terminal-based interface and which log sources your system provides.

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