Graphics Applications PDF Viewer The PDF Viewer is another simple application, whose functionality is limited to viewing PDF files on-screen. To start the PDF Viewer, select Main Menu | Graphics | PDF Viewer or run the xpdf application from the command line. To access a file, use the right-hand mouse button and select Open from the menu. From the command line you can view a PDF document, specifying it as the first parameter on the command line. If we wanted to display the file chapter05.pdf, we would use the following command: $ xpdf chapter05.pdf If you want to convert a document into PDF format, there are a number of ways to achieve this. In essence it involves converting to the postscript file format, and then using a utility to convert to the PDF file format using the PS2PDF converter supplied with Ghostscript. For more information, see http://www.pathcom.com/~kujira/pdf_idx.htm. OpenDraw The OpenDraw application is installed as part of the OpenOffice suite, and is similar to the Microsoft Draw application that is now embedded within Microsoft Word. It allows you to draw diagrams using a variety of 2D- and 3D-objects and shapes, group and color them, and then embed your diagrams into your OpenOffice documents. It also supports the generation of graphs and the manipulation of text within your image. System Applications There are numerous other applications available and installed with Red Hat 9. Half the fun of a new operating system is exploring all these applications. There is much that isn’t installed by default, but is available on the Internet as freeware. In this section of the chapter we’ll talk about some of the handy system utilities and bread-and-butter applications that are usually not so exciting but are there to make your life easier. The applications we’ll examine here are the file managers, file compression utilities, and emulators. A Simple Text Editor For many users, the way in which tasks are accomplished primarily via GUI-based applications is a big attraction. Unix has always been associated with command line input, and it was not until the X-Windows system provided a GUI front-end that things become easier. One application that lends itself to this method of input is the simple text editor. 156
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