what is ghostscript
Ghostscript is a suite of software based on an interpreter for Adobe Systems ' PostScript and Portable Document Format (PDF) page description languages. Moonshiner is a graphical front-end for using Ghostscript to convert from PostScript to PDF, aiming to be a Linux work-alike for Adobe's Distiller. 2  Okular runs under Unix/X11 and Microsoft Windows (using KDE4 for Windows). 3  It is a KDE4 application.