## Accessing via the backend log

In the Global menu, go to Advanced → Show backend log

## Location on the disk

Backend logs are stored on the file system. To find them, open the Data directory, go to the `log` subdirectory and find the latest log file, e.g. `trilium-2022-12-14.log`.

## Reporting backend bugs

You can attach the whole file to the bug report (preferable) or open it and copy-paste only the last lines / lines you believe are relevant.

## Customizing the retention of logs

The backend logs are fully managed by the Trilium server. By default the last 90 days worth of logs are kept; the logs older than that are deleted in order to reduce the space consumption.

It's possible to change the retention period by modifying the Configuration (config.ini or environment variables) via the `.ini` file:

    [Logging]
    retentionDays=7

Or via the environment variable `TRILIUM_LOGGING_RETENTION_DAYS`.

Special cases:

- Positive values indicate the number of days worth of logs to keep
- A value of 0 results with the default value (90 days) to be used
- Negative values (e.g. `-1`) result with all logs to be kept, irrespective how ancient and numerous (and

If you set the retention days to a low number, you might notice that not all the log files are being deleted. This is because a minimum number of logs (7 at the time of writing) is maintained at all times.