Software and hardware requirements
OpenKM can be installed on any operating system (Linux, Windows, Mac OS X, ...) since it is a multi-platform system. In order to install OpenKM you will need to install Java Development Kit 1.6. The Java Development Kit (JDK) 1.6 is available at Oracle Java Downloads page. If you install the JRE, OpenKM will not run properly.
OpenKM runs quite well on any computer with a common hardware configuration. It is recommended to have 2 GB RAM and a fast hard disk like SATA or better. A dual-core Intel based CPU with 3.20 GHz should be fine for a reduced community of users (30-50 concurrent users). Be sure to have enough disk space for the document repository and its versions.
A Linux host is a good choice because this OS handles heavy I/O applications like this quite well, and it is very cheap :)
For more information, take a look at our hardware requirements OpenKM website section.