Learning the Unix Operating System: A Concise Guide for the New User
Jerry Peek, Grace Todino
Language: English
Pages: 176
ISBN: B00JG9AVTG
Format: PDF / Kindle (mobi) / ePub
If you are new to Unix, this concise book will tell you just what you need to get started and no more. Unix was one of the first operating systems written in C, a high-level programming language, and its natural portability and low price made it a popular choice among universities. Initially, two main dialects of Unix existed: one produced by AT&T known as System V, and one developed at UC Berkeley and known as BSD. In recent years, many other dialects have been created, including the highly popular Linux operating system and the new Mac OS X (a derivative of BSD).Learning the Unix Operating System is a handy book for someone just starting with Unix or Linux, and it's an ideal primer for Mac and PC users of the Internet who need to know a little about Unix on the systems they visit. The fifth edition is the most effective introduction to Unix in print, covering Internet usage for email, file transfers, web browsing, and many major and minor updates to help the reader navigate the ever-expanding capabilities of the operating system:
- In response to the popularity of Linux, the book now focuses on the popular bash shell preferred by most Linux users.
- Since the release of the fourth edition, the Internet and its many functions has become part of most computer user's lives. A new chapter explains how to use ftp, pine for mail, and offers useful knowledge on how to surf the web.
- Today everyone is concerned about security. With this in mind, the author has included tips throughout the text on security basics, especially in the Internet and networking sections.
The book includes a completely updated quick reference card to make it easier for the reader to access the key functions of the command line.
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................................................................................. Shell Aliases and Functions ............................................................. Programming .................................................................................... Using Unix on Non-Unix Systems ................................................... 136 139 139 140 Glossary ................................................................................................ 143 Index
................................................................................. Shell Aliases and Functions ............................................................. Programming .................................................................................... Using Unix on Non-Unix Systems ................................................... 136 139 139 140 Glossary ................................................................................................ 143 Index
button on that box; in some cases, this will send a “destroy” signal to the window. (All this depends on the window manager you’re using!) If several windows are frozen, try these techniques on each window. If the windows go away, there’s still a chance their Unix processes (the running programs) haven’t gone away. Or, if the windows don’t go away, then there probably ar e Unix processes left over. So it’s best to check for and kill any leftover processes. In Chapter 7, the section “Cancelling a
need (as in the previous section) and identify yourself to the Unix system. There are generally two ways to log in: graphically and nongraphically. If your screen has a window or windows floating in it, something like Figure 2-2A, you probably need to log in graphically, as explained by “the section “A. Ready to Run X (with a Graphical Login)” in Chapter 2. Otherwise, to log in nongraphically, enter your username (usually your name or initials) and your private password. The password does not
The answer, something like bash or /bin/bash, is your shell’s name or pathname. † This can happen if you’re using a window system that was started by the superuser when the system was rebooted. Or maybe your prompt has been customized to end with # when you aren’t the superuser. Working in the Unix Environment 7 The first word that you type at a shell prompt is always a Unix command (or program name). Like most things in Unix, program names are case sensitive; if the program name is lowercase
