| Error Message | Likely Cause | Solution | | :--- | :--- | :--- | | Update failed: Invalid plugin format | You downloaded an old v16 plugin pack, not the new v20. | Ensure filename ends with all20.tar.gz (not all-16.tar.gz ). | | Permission denied | Nessus user cannot read the tarball. | chmod 644 nessusupdateplugins_all20.tar.gz on Linux. | | Checksum mismatch after upload | File corrupted during USB transfer. | Re-copy the file; use SCP or rsync instead of drag-and-drop. | | Service fails to start after update | Not enough disk space. | Run df -h (Linux) or check C: drive on Windows. Nessus needs 5GB+ free. |
sudo /opt/nessus/sbin/nessuscli update /path/to/NessusUpdatePlugins-all-20.tar.gz download nessusupdateplugins all20targz new
# Save the plugin to a temporary file tmp_file_path = os.path.join(target_dir, 'temp.tar.gz') with open(tmp_file_path, 'wb') as file: file.write(response.content) | Error Message | Likely Cause | Solution
This is normal after a full all20 update. The scanner is compiling NASL scripts. Check nessusd.messages log. If it exceeds 2 hours, restart the service again. | chmod 644 nessusupdateplugins_all20
: Move the file to the offline scanner and run the Nessus CLI update command for your operating system. Update Plugins Offline (Tenable Nessus 10.12)
Open the Command Prompt as an Administrator and navigate to the Nessus directory:
"C:\Program Files\Tenable\Nessus\nessuscli.exe" fetch --challenge macOS: /Library/Nessus/run/sbin/nessuscli fetch --challenge Copy the string of characters outputted by the terminal. Step 2: Request the Archive Link