Our look is the result of reader comments, our own experimentation, and feedback from distribution channels. Distinctive covers complement our distinctive approach to technical topics, breathing personality and life into potentially dry subjects. The image on the cover of SELinux: NSA's Open Source Security Enhanced Linux depicts surveying soldiers. During the second half of the nineteenth century, following the Civil War, the U.S. military dispatched troops to the American West to subdue hostilities between Native Americans and settlers. These intrepid soldiers braved a chaotic environment; they were frequently confronted with shoot-outs, ambushes, and snipers in their struggle to bring order to the American frontier. Among these troops were the Buffalo soldiers, the first peacetime regiments of African-American cavalry in the military. Despite being stationed in extremely dangerous terrain with inferior supplies, the Buffalo soldiers became one of the most distinguished military units in the Old West. To future generations of soldiers, they were models of courage and dedication in the face of adversity. Sanders Kleinfeld was the production editor and copyeditor for SELinux: NSA's Open Source Security Enhanced Linux. Jamie Peppard was the proofreader. Mary Anne Weeks Mayo and Claire Cloutier provided quality control. Caitrin McCullough provided production assistance. Judy Hoer wrote the index.

Emma Colby designed the cover of this book, based on a series design by Hanna Dyer and Edie Freedman. The cover image is a 19th-century engraving from the Dover Pictorial Archive. Clay Fernald produced the cover layout with QuarkXPress 4.1 using Adobe's ITC Garamond font.

Melanie Wang designed the interior layout, based on a series design by David Futato. The chapter opening images are from the Dover Pictorial Archive, Marvels of the New West: A Vivid Portrayal of the Stupendous Marvels in the Vast Wonderland West of the Missouri River, by William Thayer (The Henry Bill Publishing Co., 1888); and The Pioneer History of America: A Popular Account of the Heroes and Adventures, by Augustus Lynch Mason, A.M. (The Jones Brothers Publishing Company, 1884). This book was converted by Julie Hawks to FrameMaker 5.5.6 with a format conversion tool created by Erik Ray, Jason McIntosh, Neil Walls, and Mike Sierra that uses Perl and XML technologies. The text font is Linotype Birka; the heading font is Adobe Myriad Condensed; and the code font is LucasFont's TheSans Mono Condensed. The illustrations that appear in the book were produced by Robert Romano and Jessamyn Read using Macromedia FreeHand 9 and Adobe Photoshop 6. The tip and warning icons were drawn by Christopher Bing. This colophon was written by Sanders Kleinfeld.