What are the system requirements if I want to install IRAF?
For a typical, single-user, workstation environment you will need a minimum of 64Mb of memory and ~128Mb of swap space. You will need about 128 of diskspace for the IRAF system (this varies a bit with the platform), although it can be stripped to about half that after the installation. If you are configuring a server your memory and swap space needs will be more (maybe much more!).