Manage Logs

Tenable Nessus Agent has the following default log files:

  • nessusd.dump — Agent dump log file used for debugging output.

  • nessusd.messages — Agent message log.

  • backend.log — Agent backend log.

  • nessuscli.log — Agent CLI log.

Default Log Locations

The following table describes the default log file locations for each operating system.

Operating System Log Location
Windows C:\ProgramData\Tenable\Nessus Agent\nessus\logs
Linux /opt/nessus_agent/var/nessus/logs
macOS /Library/NessusAgent/run/var/nessus/logs