My task is to convert a couple thousand images (and have functionality to convert new images) from the RGB colorspace to CMYK colorspace. This will be done on an oldish fedora core 3 server.FYI ...

How to Convert CMYK to PMS With Adobe Illustrator. Adobe Illustrator includes tools to quickly recolor artwork. Using these tools, you can convert process colors -- cyan, magenta, yellow and black ...

In this article we will explain how to add CMYK support to the GIMP graphics editor, this should work for Windows, Mac and Linux versions.