Xlogmaster is a graphical utility for monitoring system messages, files, devices and the output of external commands. It uses GTK and brings several traditional Unix monitoring techniques into a single interface.
The application was designed to make it easier to observe activity from multiple sources without repeatedly switching between terminal windows. It can display information as it changes and apply rules that help identify important events.
Xlogmaster distinguishes between filters that affect how information appears and filters that perform actions when particular events occur. This makes it useful not only for inspecting messages but also for responding automatically to conditions identified in monitored output.
Xlogmaster is an older application built around GTK 1.2. Its upstream documentation is dated, so compatibility with modern Linux desktops should not be assumed.
This is free and open source software.
Key Features
- Tail mode monitors files for newly appended content at configurable intervals.
- Cat mode rereads files and devices periodically, including information exposed through /proc.
- Run mode executes external programs and displays their standard output.
- Supports monitoring multiple sources from the same graphical interface.
- Recognises log rotation when following files.
- Provides plugins that transform incoming data before display and filtering.
- Supports regular expression matching for display filters.
- Offers Raise, Lower and Hide actions for highlighting, dimming or suppressing matching lines.
- Provides Alert and Notice actions to draw attention to significant events.
- Can execute programs or scripts when configured patterns are detected.
- Supports audio notifications and automatic restoration of a minimised window.
- Includes personal and system-wide configuration databases.
- Offers keyboard accelerators for common operations.
Website: www.gnu.org/software/xlogmaster
Support:
Developer: Georg C. F. Greve
License: GNU General Public License v3.0

Xlogmaster is written in C++. Learn C++ with our recommended free books and free tutorials.
Related Software
| Graphical and Web-Based Log Viewers | |
|---|---|
| Logdy | View and filter terminal output in real time through a local web UI |
| frontail | Stream and filter live output in your web browser |
| Giant Log Viewer | Open enormous text files without loading them into memory |
| LogNote | Inspect files, command output and Android logcat with flexible filters |
| Chipmunk | Analyse multi-gigabyte files quickly with a responsive graphical interface |
| QLogExplorer | Explore very large files with advanced searches and JSON support |
| glogg | Graphical grep-style searching for very large files |
| Xlogmaster | Monitor files, devices and command output with event-triggered actions |
Read our verdict in the software roundup.
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