Although the idea of putting something from Microsoft on a Linux box might sound awful at first, you may find a reason to use Microsoft TrueType fonts on a Linux server. If you’re using GD to render an image, these fonts may come in handy. If you have an RPM-based linux distribution, you can use a spec file that is available on SourceForge. You can follow the instructions on the project’s page, or you can follow these abbreviated instructions here: