I wanted to connect to a Red Hat host with GUI. I have installed "No Machine" on that server. It worked perfectly. I got back to work a week later and the software is still installed but it no longer seems to work. I think I just need to run it again. The problem is that I don't have GUI access and I can't seem to find the instructions I previously used.
The question is:
How to run a NoMachine service from command line and check that it is running?