Log Viewer lost

After restart my RaspberryPi 2 (OHab 2.3) I cannot access “Openhab Log Viewer” anymore (http://openhabianpi:9001/). The error displayed in the webpage:

I tried to restart several times (also: sudo systemctl restart openhab2.service) without any success.

Any ideea how to fix that?

Have you tried with your server IP address e.g.

Yes, but not working either.

Check the dashboard.cfg file in /etc/openhab2/services at the top you should have something similar to
frontail.link-name=openHAB Log Viewer


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I think I have it right:

frontail.link-name=openHAB Log Viewer

Try clearing the cache and tmp files with sudo systemctl stop openhab2.service then sudo openhab-cli clean-cache and sudo systemctl start openhab2.service

Followed your steps… no result.

Check if you still have this file:

sudo nano /var/lib/openhab2/etc/org.ops4j.pax.logging.cfg
shows me an empty page. So the file exist.

sudo nano creates a file. Move to the directory and see whats there. Use cd /var/lib/openhab2/etc hit enter then type ls to see everything in the directory. To view the file use cat org.ops4j.pax.logging.cfg

cat: org.ops4j.pax.logging.cfg: No such file or directory

Did you use cat from the home directory? If so you need to specify the full path cat /var/lib/openhab2/etc/org.ops4j.pax.logging.cfg

That may be the reason you’ve lost the log viewer. Use openhabian tool to try and reinstall.

Do I have to reinstall the whole system or there is an option for the Viewer Log only?

There is an option for log viewer. sudo openhabian-config then select “optional components” then log viewer is the first selection.

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No luck at all :frowning:
Not able even to reinstall Log Viewer from openhabian-config:

2018-10-20_17:50:53_EEST [openHABian] Installing the openHAB Log Viewer (frontail)...
$ npm install -g frontail
node: symbol lookup error: /usr/lib/arm-linux-gnueabihf/libstdc++.so.6: undefined symbol: _ZTISi, version GLIBCXX_3.4
FAILED (frontail)

Do you have a recent backup?

Unfortunatelly not.

Make one using sudo openhab-cli backup and move that file to your PC or somewhere other than OH. The backup zip will be in /var/lib/openhab2/backups directory.