Hi
Acrobat DC is not available for Linux. On Linux, AEM Forms PDFG Generator uses native libraries and OpenOffice to convert supported formats to PDF documents. To configure AEM Forms PDFG on Linux, follow all the steps mentioned in the document except installing Acrobat DC. The step to install Acrobat DC is only for Microsoft Windows. Do follow the steps mentioned in Additional requirements for Linux and Solaris section of the document. PDF Generator would turn out just fine. Do let me know if you still face any issue or have any query.
Thanks,
Khushwant Singh