Troubleshooting

Fixing LibreNMS After Updates: Missing Restify Provider

August 13, 2026

Infrastructure, Monitoring, Troubleshooting

Librenms, Rhel9, Php, Composer, Updates, Troubleshooting, Monitoring

Fixing LibreNMS After Updates: Missing Restify Provider #

After a routine package update on my RHEL 9 LibreNMS server, the web UI stopped working and the logs showed a very familiar Laravel-style error:

[CRITICAL] Exception: Error Class "Binaryk\LaravelRestify\RestifyApplicationServiceProvider" not found @ /opt/librenms/app/Providers/RestifyServiceProvider.php:15

At first glance it looks like a code issue, but in this case the root cause was simpler: the PHP dependencies under /opt/librenms were stale or partially updated.

Fixing Broken Thumbnails on Ubuntu 24.04.4 LTS Caused by AppArmor User Namespaces

April 17, 2026

Linux, Desktop, Security, Troubleshooting

Ubuntu, Gnome, Apparmor, Security, Troubleshooting, Kernel, Desktop, Namespaces

Fixing Broken Thumbnails on Ubuntu 24.04.4 LTS Caused by AppArmor User Namespaces #

On my Ubuntu 24.04.4 LTS desktop, which I’d been using for about six months, I ran into a surprisingly stubborn issue: GNOME Files (Nautilus) completely stopped generating thumbnails for both images and videos. At first glance it looked like a typical desktop breakage: thumbnail cache issues, missing codecs, or a corrupted Nautilus config. But none of the usual fixes helped.