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Unix in 24 Hours, Sams Teach Yourself: Covers OS X, Linux, and Solaris, Fifth Edition

Name: Unix in 24 Hours, Sams Teach Yourself: Covers OS X, Linux, and Solaris, Fifth Edition
Author: Dave Taylor
ISBN: 9780134095554

by Dave Taylor

October 2015

Beginner

496 pages

14h 23m

English

Sams

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About This eBook
Title Page
Copyright Page
Contents at a Glance
Table of Contents
About the Author
Dedication
Acknowledgments
We Want to Hear from You!
Reader Services

Introduction
Does Each Chapter Take an Hour?What if I Take Longer Than 24 Hours?How to Use This BookMain SectionTasksWorkshops
Hour 1. What Is This Unix Stuff?
What Is Unix?A Brief History of UnixThe C Programming LanguageUnix Becomes PopularWhat’s All This About Multiuser Systems?Cracking Open the ShellGetting HelpTask 1.1: Man Pages, Unix Online ReferenceTask 1.2: Other Ways to Find Help in UnixSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 2. Getting onto the System and Using the Command Line
Beginning Your SessionTask 2.1: Logging In to and Out of the SystemTask 2.2: Changing Passwords with passwdTask 2.3: Picking a Secure PasswordSeeing What’s Going On Around YouTask 2.4: Who Are You?Task 2.5: Finding Out What Other Users Are Logged In to the SystemTask 2.6: What Is Everyone Doing on the Computer?Task 2.7: Checking the Current Date and TimeSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 3. Moving About the File System
What a Hierarchical File System Is All AboutTask 3.1: The Unix File System OrganizationThe bin DirectoryThe dev DirectoryThe etc DirectoryThe lib DirectoryThe lost+found DirectoryThe mnt and sys DirectoriesThe tmp DirectoryThe usr DirectoryOther Miscellaneous Stuff at the Top LevelDirectory Separator CharactersThe Difference Between Relative and Absolute FilenamesTask 3.2: Hidden Files in UnixTask 3.3: The Special Directories . and ..Task 3.4: The env CommandTask 3.5: PATH and HOMETask 3.6: Find Where You Are with pwdTask 3.7: Moving to Another Location with cdSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 4. Listing Files and Managing Disk Usage
The ls CommandTask 4.1: All About the ls CommandTask 4.2: Having ls Tell You MoreTask 4.3: Combining FlagsTask 4.4: Listing Other Directories Without Changing LocationSpecial ls Command FlagsTask 4.5: Changing the Sort Order in lsTask 4.6: Listing Directory Trees Recursively in lsTask 4.7: Long Listing Format in lsPermissions StringsTask 4.8: Long Listing Format for Directories in lsTask 4.9: Creating Files with the touch CommandTask 4.10: Checking Disk Space Usage with duTask 4.11: Checking Available Disk Space with dfTask 4.12: Shrinking Big Files with the gzip ProgramSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 5. Ownership and Permissions
Working with File PermissionsTask 5.1: Understanding File Permissions SettingsTask 5.2: Directory Permissions SettingsTask 5.3: Modifying File and Directory Permissions with chmodTask 5.4: Setting New File Permissions with chmodTask 5.5: Calculating Numeric Permissions StringsTask 5.6: Establishing Default File and Directory Permissions with the umask CommandTask 5.7: Identifying Owner and Group for Any File or DirectorySummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 6. Creating, Moving, Renaming, and Deleting Files and Directories
Manipulating the Unix File SystemTask 6.1: Creating New Directories Using mkdirTask 6.2: Copying Files to New Locations Using cpTask 6.3: Moving Files to New Locations Using mvTask 6.4: Renaming Files with mvTask 6.5: Removing Directories with rmdirTask 6.6: Removing Files Using rmTask 6.7: Minimizing the Danger of the rm CommandSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 7. Looking into Files
Looking Inside FilesTask 7.1: Using file to Identify File TypesTask 7.2: Exploring Unix Directories with fileTask 7.3: Peeking at the First Few Lines with headTask 7.4: Viewing the Last Few Lines with tailTask 7.5: Viewing the Contents of Files with catTask 7.6: Viewing Larger Files with moreSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 8. Filters, Pipes, and Wildcards!
Maximizing the Command LineTask 8.1: The Secrets of File RedirectionTask 8.2: Counting Words and Lines Using wcTask 8.3: Sorting Information Using sortTask 8.4: Filename WildcardsTask 8.5: Searching Files with grepTask 8.6: Creating Regular ExpressionsTask 8.7: The Rest of the grep FamilySummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 9. Slicing and Dicing Command-Pipe Data
The awk Programming SystemTask 9.1: Learning to Use awkHow to Use cut in PipesAction 9.2: Slicing and Dicing with cutInline Editing with sed and trAction 9.3: Inline Editing with sed and trSummaryWorkshopExercisesPreview of the Next Hour
Hour 10. An Introduction to the vi Editor
Editing the Unix WayTask 10.1: Starting and Quitting viTask 10.2: Simple Cursor Motion in viTask 10.3: Moving by Words and PagesTask 10.4: Inserting Text Using i, a, o, and OTask 10.5: Deleting TextSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 11. Advanced vi Tricks, Tools, and Techniques
Advanced Editing with viTask 11.1: Searching Within a FileTask 11.2: The Colon Commands in viTask 11.3: Starting vi CorrectlyTask 11.4: Searching and ReplacingTask 11.5: Using the Change and Replace CommandsTask 11.6: Accessing Unix with !Summary of vi CommandsSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 12. An Overview of the emacs Editor
The Other Popular Editor: emacsTask 12.1: Launching emacs and Inserting TextTask 12.2: Moving Around in a FileTask 12.3: Deleting Characters and WordsTask 12.4: Searching and Replacing in emacsTask 12.5: Using the emacs Tutorial and Help SystemTask 12.6: Working with Other FilesSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 13. Introduction to Command Shells
The (Command) Shell GameTask 13.1: What Shells Are Available?Task 13.2: Identifying Your ShellTask 13.3: Choosing a New ShellTask 13.4: Learning the Shell EnvironmentTask 13.5: Exploring bash Configuration FilesSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 14. Advanced Shell Interaction
Which Shell Is Which?Task 14.1: The Shell History MechanismsTask 14.2: Using History to Cut Down on TypingTask 14.3: Command AliasesTask 14.4: Some Power AliasesTask 14.5: Setting Custom PromptsSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 15. Job Control
Wrestling with Your JobsTask 15.1: Job Control in the Shell: Stopping JobsTask 15.2: Foreground/Background and Unix ProgramsTask 15.3: Finding Out What Tasks Are RunningTask 15.4: Terminating Processes with killSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 16. Shell Programming Overview
Building Your Own CommandsTask 16.1: Shell VariablesTask 16.2: Shell ArithmeticTask 16.3: Comparison FunctionsTask 16.4: Conditional ExpressionsTask 16.5: Looping ExpressionsTask 16.6: bash FunctionsSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 17. Advanced Shell Programming
Searching a Database of Filenames with mylocateTask 17.1: Building mylocateTask 17.2: How Many Commands Do You Have?Task 17.3: Who Is Using All the Disk Space?Task 17.4: Let’s Play a (Shell Script) Game!SummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 18. Printing in the Unix Environment
Making a Printed CopyTask 18.1: Finding Local Printers with lpstatTask 18.2: An Introduction to CUPSTask 18.3: Printing Files with lpr or lpTask 18.4: Formatting Print Jobs with pr and colTask 18.5: Working with the Print QueueSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 19. Archives and Backups
The tar Tape Archive UtilityTask 19.1: Learning to Use tarThe zip Archive UtilityTask 19.2: Learning to Use zipShrinking Your Files with compressAction 19.3: Shrinking Large Files on UnixExploring the Unix Tape Command: cpioAction 19.4: A Quick Exploration of cpioPersonal Backup SolutionsAction 19.5: A Personal Backup SchemeWorking with Linux Package ManagersSummaryWorkshopExercisesPreview of the Next Hour
Hour 20. Using Email to Communicate
Interacting with the WorldTask 20.1: Reading Electronic Mail with mailxTask 20.2: Sending Mail from the Command LineTask 20.3: Sending Email to the Rest of the WorldSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 21. Connecting to Remote Systems Using SSH and SFTP
Stepping Beyond Your Own SystemTask 21.1: Connecting to Remote Internet Sites with SSHTask 21.2: Third-Party SSH ConnectionsTask 21.3: Copying Files with SFTPTask 21.4: Exploring Anonymous FTP ArchivesSummaryWorkshopKey TermsExercisesPreview of the Next Hour
Hour 22. Searching for Information and Files
Finding What’s WhereTask 22.1: The find Command and Its Weird OptionsTask 22.2: Using find with xargsTask 22.3: Getting Files from the InternetSummaryWorkshopExercisesPreview of the Next Hour
Hour 23. Perl Programming in Unix
Flexible and Powerful: PerlTask 23.1: Exchange, a Demonstration Currency Translator Written in PerlTask 23.2: Checking Code Quality with -wTask 23.3: Online Perl Documentation and InformationTask 23.4: Other Useful Perl CommandsSummaryWorkshopKey TermsExercises
Hour 24. GNOME and the GUI Environment
Tweaking Your Inner GNOMETask 24.1: Fine-tuning Your GNOME ConfigurationWorking with GNOME ApplicationsTask 24.2: Working with the GNOME File BrowserTask 24.3: The Firefox Web BrowserTask 24.4: Using Thunderbird for EmailSummaryCongratulations!WorkshopKey TermsExercises
Appendix A. Common Unix Questions and Answers
How do I use find|xargs with filenames that contain spaces?How do I find large files on my system?How do I run a program on a schedule?The at CommandcronHow do I fix file permission problems?How do I list files that don’t match a given pattern?How do I view lines X–Y in a text file?How do I add a new directory to my PATH?How do I recover deleted files?How can I set my shell to protect me from accidental deletions?What do the shell errors arg list too long and broken pipe mean?Why use ssh instead of telnet? Or sftp instead of ftp?Summary
Index
Code Snippets

Content preview from Unix in 24 Hours, Sams Teach Yourself: Covers OS X, Linux, and Solaris, Fifth Edition

Hour 16. Shell Programming Overview

Goals for This Hour

In this hour, you will learn

About shell variables

About shell arithmetic

About comparison functions

How to use conditional expressions

About looping expressions

How to use bash functions

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Unix in 24 Hours, Sams Teach Yourself: Covers OS X, Linux, and Solaris, Fifth Edition

by Dave Taylor

Hour 16. Shell Programming Overview

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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