nmon ships with system-tools 8.1.103 (LE 7.90.009 and upwards): system-tools: add nmon by awiouy · Pull Request #979 · LibreELEC/LibreELEC.tv · GitHub
Many thanks - will check it out and report back if all works as expected.
EDIT: I upgraded from 007 to 009 but unfortunately nmon wasn't there. I deleted system-tools and Network-tools, but when I tried to add them again, nothing happened. No messages, nothing.
I tried rebooting and also tried installing multimedia-tools but that wouldn't install either.
I tried installing from another repository and that was fine.
Is there anyway to update the repository or download the package as a zip and install it that way?
Is Libreelec repository broken?