I tried disabling the motd.dynamic in /var/run renaming the file, but did not work because the system recreates the file.
Does anyone know disable it?
The script files in
/etc/update-motd.d generate the file
/var/run/motd.dynamic which you've identified as containing your MOTD.
A simplistic way to stop generating this file would be to make all of the scripts non-executable with:
chmod -x /etc/update-motd.d/*
Note: Information taken from this answer by heemayl.
If anyone landed here because they specifically wanted to disable the "news" (ie. ads/promotional blurbs for things like macOS Kubernetes tooling) portion of the dynamic MOTD, but don't mind the rest being there (eg. the pending updates notification), that's easy too.
At the time I wrote this, this was the ad being displayed:
* "If you've been waiting for the perfect Kubernetes dev solution for
macOS, the wait is over. Learn how to install Microk8s on macOS."
Just open up
/etc/default/motd-news and set