For diagnostics and troubleshooting, Unit provides a single general-purpose log. Usually, the log file is found here: /var/log/unit.log. To locate it in your system, run unitd --help:

# unitd --help

    unit options:
    --log FILE           set log filename
                         default: "/home/user/unit.log"

As the output above suggests, log location can be customized at startup: unitd --log FILE. To look at Unit’s command line arguments, run the following command:

# ps ax | grep unitd

If Unit’s not running, refer to Unit-related startup scripts or configuration files in your system to discover the log file location.

Debug Log

Unit log supports two verbosity modes: common and debug. The steps to enable debug-level logging depend on how you install Unit.

Warning: Debug log grows very quickly. It is intended for developers and should be enabled for detailed reporting and investigation.

Installation From Our Repositories

When you install Unit using the binary packages from our repositories, a debug version of unitd is installed from the unit package, called unitd-debug. To start Unit in debug mode, run the following command:

# unitd-debug <command line options>

Also, our repositories include packages with debug symbols for core dump analysis. They have -dbg suffixes, for example unit-dbg.

Installation From Source

To configure debug-level logging when installing from source, use the --debug option:

# ./configure --debug

Then recompile and reinstall Unit modules.

Getting Support

Mailing List

For any unresolved questions, a community mailing list is available: To subscribe, send an email to or sign up here.


You can also visit our GitHub repositories to report an issue, suggest a feature, or ask questions: