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Essential System Administration, 3rd Edition by Æleen Frisch

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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 animal featured on the cover of Essential System Administration, Third Edition, is an armadillo. This insect-eating mammal is native to South America and has spread through the southern United States. Unlike most insectivores, the armadillo has teeth-rootless pegs set far back in its mouth. These teeth allow it to supplement its diet of termites, scorpions, and other insects with snakes, poultry, fruit, and eggs.

The armadillo’s name, “little armored thing,” was given to it by the Spanish when they invaded the New World. This “armor” is an outer layer consisting of numerous bony plates with a horny covering. This shell is hinged at the middle of the back, allowing the front and hind sections freedom of movement. In some species, this covering extends over the face and tail as well as the torso and limbs.

Armadillos range in size from the great armadillo, at 5 feet in length, to the fairy armadillo, at 5 inches. The most common of the armadillos, the 9-banded armadillo, is about the size of a house cat.

Leanne Soylemez was the production editor and copyeditor for Essential System Administration, Third Edition. Sheryl Avruch, Jane Ellin, Colleen Gorman, and Darren Kelly provided quality control. Æleen Frisch wrote the index.

The cover ...

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