linux command 'screen'

I recently purchased a dedicated server for webhosting/game server hosting. I need stuff to be ran in the background, so they dont terminate when I disconnect. Whenever I try the 'screen' command, it says command not found(which means its not installed, right?). Is it supposed to be installed by default, or can you download it and install it? If anyone has any clue about this, please help me, or if you know another way to run a process in the background. I am using Redhat 8 by the way!

 

 

 

 

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