原版书书名：Linux System Programming, 2nd Edition
The image on the cover of Linux System Programming is a man in a flying machine. Well before the Wright brothers achieved their first controlled heavier-than-air flight in 1903, people around the world attempted to fly by simple and elaborate machines. In the second or third century, Zhuge Liang of China reportedly flew in a Kongming lantern, the first hot air balloon. Around the fifth or sixth centuries, many Chinese people purportedly attached themselves to large kites to fly through the air.It is also said that the Chinese created spinning toys that were early versions of helicopters, the designs of which may have inspired Leonardo da Vinci in his initial attempts at a solution to human flight. da Vinci also studied birds and designed parachutes, and in 1845, he designed an ornithopter, a wing-flapping machine meant to carry humans through the air. Though he never built it, the ornithopter's birdlike structure influenced the design of flying machines throughout the centuries.The flying machine depicted on the cover is more elaborate than James Means's model soaring machine of 1893, which had no propellers. Means later printed an instruction manual for his soaring machine, which in part states that "the summit of Mt. Willard, near the Crawford House, N.H., will be found an excellent place" to experiment with the machines.But such experimentation was often dangerous. In the late nineteenth century, Otto Lilienthal built monoplanes, biplanes, and gliders. He was the first to show that control of human flight was within reach, and he gained the nickname "father of aerial testing," as he conducted more than 2,000 glider flights, sometimes traveling more than a thousand feet. He died in 1896 after breaking his spine during a crash landing.Flying machines are also known as mechanical birds and airships, and are occasionally called by more colorful names such as the Artificial Albatross. Enthusiasm for flying machines remains high, as aeronautical buffs still build early flying machines today.The cover image and chapter opening graphics are from the Dover Pictorial Archive. The cover font is Adobe ITC Garamond. The text font is Adobe Minion Pro; the heading font is Adobe Myriad Condensed; and the code font is Dalton Maag's Ubuntu Mono.