UNIX for Dummies

UNIX has been evolving feverishly for close to 30 years, sort of like bacteria in a cesspool – only not as attractive. As a result, many different varieties of UNIX have existed along the way. Although they all share numerous characteristics, they differ just enough that even experienced users are tripped up by the differences between versions.

If you’re like most UNIX users, a zealot stopped at your desk, connected your terminal or workstation, gave you five minutes of incomprehensible advice, demonstrated a few bizarre games (like roaches that hide behind the work on your screen), and disappeared. Now you’re on your own.

Don’t worry. UNIX For Dummies, 4th Edition, cuts through all the technojargon lurking in the UNIX command jungle to deliver clear instructions just how and when you need them. This indispensable reference includes sections on

Typing commands

Copying, renaming, and deleting files

Printing files

Finding where your file went

Using the Internet from UNIX

Connecting and communicating with people on other computers

Discover how to get your UNIX system’s attention, persuade it that you are allowed to use it, and even accomplish something useful as you find out how to

Choose the right flavor of UNIX for you

Set up and operate UNIX terminals

Manage files, directories, and printing

Use the Common Desktop Environment and other window systems

Browse the Web, send and receive e-mail, and read Usenet newsgroups

Deal with all the major versions of UNIX, including Berkeley UNIX, Solaris, and SunOS

Troubleshoot and solve common problems

The expert writing team of John Levin and Margaret Levin Young also give you a look at the latest developments with Linux, the wildly popular, completely free version of UNIX – all in a single volume designed to put you in command with a computer system that can be tamed.The title of this book invites comment. “Some things weren’t meant for dummies and Unix is one of them,” you might say. Wrong! Levine and Young take advantage of the Dummies format’s strength with command-line operating systems. They flatten the learning curve and have even the greenest beginner doing useful work with Unix in mere hours.

Once you get past a couple of pointless chapters about offering pizza to Unix experts in exchange for help, you’ll find conceptual explanations of files, directories, permissions, and redirection. Command explanations take a hybrid form; they mix “type this verbatim” statements with tables showing switches and parameters.

Much of Unix for Dummies is task-oriented. You’ll find a whole chapter on printing, for example, that covers the commands you’ll need to know to format and print a document on the right printer. Other chapters cover file searches, software installation, and X Windows navigation. The book also provides cursory coverage of four text editors–ED, vi, Emacs, and pico–but you learn little more than how to enter and save text in each.

Levine and Young include an eminently useful “DOS-to-Unix Rosetta Stone” that immediately tells you, for example, that the approximate Unix equivalent of DOS’s copy is cp. DOS experts who are new transplants to a Unix environment will appreciate this translation guide. The authors wrap up with a wealth of basic troubleshooting information and a command reference.

This book, along with its companion, More Unix for Dummies, is the perfect choice for those who have no knowledge of Unix and need to learn it quickly.

UNIX for Dummies

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In these Messenger Lectures, originally delivered at Cornell University and recorded for television by the BBC, Richard Feynman offers an overview of selected physical laws and gathers their common features into one broad principle of invariance. He maintains at the outset that the importance of a physical law is not “how clever we are to have found it out, but . . . how clever nature is to pay attention to it,” and tends his discussions toward a final exposition of the elegance and simplicity of all scientific laws. Rather than an essay on the most significant achievements in modern science, The Character of Physical Law is a statement of what is most remarkable in nature. Feynman’s enlightened approach, his wit, and his enthusiasm make this a memorable exposition of the scientist’s craft.

The Law of Gravitation is the author’s principal example. Relating the details of its discovery and stressing its mathematical character, he uses it to demonstrate the essential interaction of mathematics and physics. He views mathematics as the key to any system of scientific laws, suggesting that if it were possible to fill out the structure of scientific theory completely, the result would be an integrated set of mathematical axioms. The principles of conservation, symmetry, and time-irreversibility are then considered in relation to developments in classical and modern physics, and in his final lecture Feynman develops his own analysis of the process and future of scientific discovery.

Like any set of oral reflections, The Character of Physical Law has special value as a demonstration of the mind in action. The reader is particularly lucky in Richard Feynman. One of the most eminent and imaginative modern physicists, he was Professor of Theoretical Physics at the California Institute of Technology until his death in 1988. He is best known for his work on the quantum theory of the electromagnetic field, as well as for his later research in the field of low-temperature physics. In 1954 he received the Albert Einstein Award for his “outstanding contribution to knowledge in mathematical and physical sciences”; in 1965 he was appointed to Foreign Membership in the Royal Society and was awarded the Nobel Prize.