The Linux Command Line, 2nd Edition: A Complete Introduction

Front Cover
No Starch Press, Mar 5, 2019 - Computers - 504 pages
You've experienced the shiny, point-and-click surface of your Linux computer--now dive below and explore its depths with the power of the command line.

The Linux Command Line takes you from your very first terminal keystrokes to writing full programs in Bash, the most popular Linux shell (or command line). Along the way you'll learn the timeless skills handed down by generations of experienced, mouse-shunning gurus: file navigation, environment configuration, command chaining, pattern matching with regular expressions, and more.

In addition to that practical knowledge, author William Shotts reveals the philosophy behind these tools and the rich heritage that your desktop Linux machine has inherited from Unix supercomputers of yore.

As you make your way through the book's short, easily-digestible chapters, you'll learn how to:

• Create and delete files, directories, and symlinks
• Administer your system, including networking, package installation, and process management
• Use standard input and output, redirection, and pipelines
• Edit files with Vi, the world's most popular text editor
• Write shell scripts to automate common or boring tasks
• Slice and dice text files with cut, paste, grep, patch, and sed

Once you overcome your initial "shell shock," you'll find that the command line is a natural and expressive way to communicate with your computer. Just don't be surprised if your mouse starts to gather dust.
 

Contents

Try Some Simple Commands
5
Navigation
7
Summing Up
12
Manipulating Files and Directories
23
InCreate Links
30
Summing Up
37
Working with Commands
39
Creating Our Own Commands with alias
46
Comparing Text
262
Summing Up
278
Formatting Output
279
Document Formatting Systems
290
Printing
297
Compiling Programs
309
226
312
WRITING SHELL SCRIPTS
321

Redirecting Standard Error
52
Seeing the World as the Shell Sees It
61
Summing Up
71
Using History
77
Permissions
81
Changing Identities
91
Changing Your Password
97
Processes
99
Controlling Processes
104
Shutting Down the System
110
The Environment
115
What Is Stored in the Environment?
116
12
127
Editing Multiple Files
139
Customizing the Prompt
145
Saving the Prompt
151
Storage Media
165
Networking
181
Summing Up
193
Searching for Files
195
Summing
208
Archiving and Backup
209
Regular Expressions
225
POSIX Character Classes
231
Putting Regular Expressions to Work
239
Text Processing
245
Slicing and Dicing
256
Writing Your First Script
323
Starting a Project
329
Here Documents
336
TopDown Design
339
Using test
352
Flow Control Branching with it
355
Reading Keyboard Input
363
Validating Input
370
Flow Control Looping with whileuntil
375
Troubleshooting
383
Logical Errors
387
Summing
394
Flow Control Branching with case
395
Summing
400
Positional Parameters
401
Flow Control Looping with for
413
Strings and Numbers
419
Arithmetic Evaluation and Expansion
427
bcAn Arbitrary Precision Calculator Language
434
Arrays
437
Array Operations
441
Exotica
447
Traps 453
453
Index
459
242
470
Copyright

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Common terms and phrases

About the author (2019)

William Shotts has been a software professional for more than 30 years and an avid Linux user for more than 20 years. He has an extensive background in software development, including technical support, quality assurance, and documentation. He is also the creator of LinuxCommand.org, a Linux education and advocacy site featuring news, reviews, and extensive support for using the Linux command line.

Bibliographic information