Mark manages the Ubiquiti UniFi applications at Incredigeek Inc. and is unable to access the UniFi controller. It starts loading and then stops. The URL bar shows that it is trying to load a null network site.

Thankfully the WiFi is still working, Mark thinks to himself, but how am I supposed to manage the network? I am able to access the UniFi Core application, so maybe I can login using a secure shell and check on the application.

ssh root@192.168.1.1

Once logged in, and after using the google, he finds that unifi-os restart will restart the UniFi applications. But I just need to restart the Network application. Running “unifi-os” –help reveals the following options.

# unifi-os --help
Usage: /usr/sbin/unifi-os [stop start restart shell 'update url']

Oh shell!

unifi-os shell

Alternatively, we know that on the UDM’s the UniFi Applications are run inside a Docker container. We could run “docker ps” to show the containers and then “docker exec -it unifi-os bash”

Now we can restart just the UniFi Network application.

systemctl restart unifi

It can take a little bit to restart.