How do I keep my screen on?

Hello
I want to be able to keep my screen on my OMV Box on
So I can monitor it.
How do I do that?

My Bad

My monitor is connected to a box I now use as a server. It was my old desktop.

My hardware is in my signature.
I boot the server and after it comes in about 5 min the screen goes dark.
I have an upcoming project that I wish to keep the screen on longer while I am running.
After that I wish to reset it as it is now.

Thanks

I used the following. The reason I used this one is that it reminded me how to edit the /etc/default/grub file

https://askubuntu.com/question…eensaver-on-ubuntu-server

It worked

Thanks again