Set kernel parameters:
/var/lib/nethserver/node/install-core.sh: line 39: sysctl: command not found
Create the api-server user:
/var/lib/nethserver/node/install-core.sh: line 43: useradd: command not found
ps. However, I seem to remember discussions where only rocky linux was the officially supported OS. I can’t find it atm, that is the issue with threads and discussions, way too many of them in too many places/tags. Hence I prefer a wiki and up to date official documentation.