[SOLVED] Must I download Adobe Acrobat Reader to view this PDF?

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http://ubuntuforums.org – Dear community, There's a PDF that I want to view, but when I download and try to view it on my Linux computer, the PDF says: Quote: Please wait... If this message is not eventually replaced by the proper contents of the document, your PDF viewer may not be able to display this type of document. You can upgrade to the latest version of Adobe Reader for Windows®, Mac, or Linux® by visiting http://www.adobe.com/products/acrobat/readstep2.html. For more assistance with Adobe Reader visit http://www.adobe.com/support/products/acrreader.html. Windows (Hardware)