I did find software such as this for linux named elvis.
Anyway, I have decided that I would rather use the software that I listed above to monitor the cameras but I would like to set-up a linux box with a software like this.
If you don't want to look at the link, a summary of this software is that it takes a 4 port osprey video card and makes it a video server. This can then be accessed using a web browser or by using a security video console software such as SecuritySpy or iCatcher Console(that software is also on the site listed above).
I would rather not have to install windows and buy this software to be able to get a video server running. Anyone have any suggestions? I looked at motion but I need to know if it only supports motion detection or if it will run continuously. I want it to run continuously.