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0 (hodnocen0 x )

EB

EB

ONLINE

Third edition

Indianapolis, IN : John Wiley & Sons, [2015]

1 online zdroj (1 volume) : ilustrace

ISBN 9781119209409 (elektronická kniha)

ISBN 1119209404 (elektronická kniha)

ISBN !9781118983843 (chyb.)

ISBN 9781118983850

ISBN 1118983858

ISBN 111898384X

ISBN 9781118983843

Tištěné vydání Blum, Richard, 1962- Linux command line and shell scripting bible. Third edition. Indianapolis, IN : John Wiley & Sons, Inc., [2015] ISBN 111898384X

Includes index

Frontmatter -- Part I: The Linux Command Line. Starting with Linux Shells -- Getting to the Shell -- Basic bash Shell Commands -- More bash Shell Commands -- Understanding the Shell -- Using Linux Environment Variables -- Understanding Linux File Permissions -- Managing Filesystems -- Installing Software -- Working with Editors -- Part II: Shell Scripting Basics. Basic Script Building -- Using Structured Commands -- More Structured Commands -- Handling User Input -- Presenting Data -- Script Control -- Part III: Advanced Shell Scripting. Creating Functions -- Writing Scripts for Graphical Desktops -- Introducing sed and gawk -- Regular Expressions -- Advanced sed -- Advanced gawk -- Working with Alternative Shells -- Part IV: Creating Practical Scripts. Writing Simple Script Utilities -- Producing Scripts for Database, Web, and E-Mail -- Creating Fun Little Shell Scripts -- Appendix A: Quick Guide to bash Commands -- Appendix B: Quick Guide to sed and gawk

Description based on print version record

* Linux

001479493

Introduction // Part I: The Linux Command Line 1 // Chapter 1: Starting with Linux Shells ...3 // What Is Linux? // Looking into the Linux kernel ...4 // System memory management ...5 // Software program management ...6 // Hardware management ...7 // Filesystem management ...8 // The GNU utilities ...9 // The core GNU utilities ...9 // The shell // The Linux desktop environment ...11 // The X Window system ...? // The KDE desktop ...12 // The GNOME desktop ...13 // The Unity desktop // Other desktops // Linux Distributions // Core Linux distributions // Specialized Linux distributions ...18 // The Linux LiveCD // Summary ...21 // Chapter 2: Getting to the Shell ...23 // Reaching the Command Line ...23 // Console terminals ...24 // Graphical terminals ...24 // Accessing CLI via a Linux Console Terminal ...25 // Accessing CLI via Graphical Terminal Emulation ...28 // XV // Contents // Using the GNOME Terminal Emulator ...29 // Accessing the GNOME terminal ...30 // The menu bar // Using the Konsole Terminal Emulator ...35 // Accessing the Konsole terminal ...35 // The menu bar ...37 // Using the xterm Terminal Emulator ...41 // Accessing xterm ...42 // Command line parameters ...43 // Summary ...44 // Chapters: Basic bash Shell Commands ...47 // Starting the Shell ...47 // Using the Shell Prompt ...48 // Interacting with the bash Manual ...49 // Navigating the Filesystem ...52 // Looking at the Linux filesystem ...52 // Traversing directories ...55 // Using absolute directory references ...56 // Using relative directory references ...57 // Listing Files and Directories ...59 // Displaying a basic listing ...59 // Displaying a long listing ...61 // Filtering listing output ...62 // Handling Files ...64 // Creating files ...64 // Copying files ...65 // Using tab auto-complete ...68 // Linking files ...68 // Renaming files ...70 // Deleting files ...72 //

Managing Directories ...73 // Creating directories ...73 // Deleting directories ...74 // Viewing File Contents ...77 // Viewing the file type ...77 // Viewing the whole file ...78 // Using the cat command ...78 // Using the more command ...79 // Using the less command ...80 // Viewing parts of a file ...81 // Using the tail command ...81 // Using the head command ...82 // Summary ...83 // xvi // Contents // Chapter 4: More bash Shell Commands ...85 // Monitoring Programs // Peeking at the processes ...85 // Unix-style parameters ...86 // BSD-style parameters ...89 // The GNU long parameters ...91 // Real-time process monitoring ...92 // Stopping processes // The kill command ...95 // The killall command ...96 // Monitoring Disk Space // Mounting media ...97 // The mount command ...97 // The unmount command ...99 // Using the df command ...?0 // Using the du command ...101 // Working with Data Files ...102 // Sorting data ...102 // Searching for data ...107 // Compressing data ...108 // Archiving data ...110 // Summary // Chapter 5: Understanding the Shell ...113 // Exploring Shell Types ...?? // Exploring Parent and Child Shell Relationships ...115 // Looking at process lists ...lig // Creatively using subshells ...121 // Investigating background mode ...121 // Putting process lists into the background ...123 // Looking at co-processing ...124 // Understanding Shell Built-In Commands ...125 // Looking at external commands ...125 // Looking at built-in commands ...127 // Using the history command ...128 // Using command aliases ...131 // Summary // Chapter 6: Using Linux Environment Variables ...I35 // Exploring Environment Variables ...135 // Looking at global environment variables ...136 // Looking at local environment variables ...138 // Setting User-Defined Variables ...138 // Setting local user-defined variables ...139 //

Setting global environment variables ...140 // Removing Environment Variables ...142 // Uncovering Default Shell Environment Variables ...143 // Setting the PATH Environment Variable ...148 // Locating System Environment Variables ...150 // Understanding the login shell process ...150 // Viewing the /etc/profile file ...151 // Viewing the SHOME startup files ...154 // Understanding the interactive shell process ...156 // Understanding the non-interactive shell process ...156 // Making environment variables persistent ...157 // Learning about Variable Arrays ...158 // Summary ...159 // Chapter 7: Understanding Linux File Permissions ...161 // Linux Security ...161 // The /etc/passwd file ...162 // The /etc/shadow file ...164 // Adding a new user ...164 // Removing a user ...168 // Modifying a user ...168 // usermod ...169 // passwd and chpasswd ...169 // chsh, chfn, and chage ...170 // Using Linux Groups ...172 // The /etc/group file ...173 // Creating new groups ...174 // Modifying groups ...175 // Decoding File Permissions ...175 // Using file permission symbols ...176 // Default file permissions ...177 // Changing Security Settings ...179 // Changing permissions ...179 // Changing ownership ...181 // Sharing Files ...182 // Summary ...184 // Chapter 8: Managing Filesystems ...187 // Exploring Linux Filesystems ...187 // Understanding the basic Linux filesystems ...188 // Looking at the ext filesystem ...188 // Looking at the ext2 filesystem ...188 // Understanding journaling filesystems ...189 // Looking at the ext3 filesystem ...190 // Looking at the ext4 filesystem ...190 // Looking at the Reiser filesystem ...190 // Looking at the journaled filesystem ...191 // Looking at the XFS filesystem ...191 // Understanding the copy-on-write filesystems ...192 // Looking at the ZFS filesystem ...192 // Looking at the Btrfs filesystem ...192 //

Working with Filesystems ...192 // Creating partitions ...193 // Creating a filesystem ...196 // Checking and repairing a filesystem ...198 // Managing Logical Volumes ...200 // Exploring logical volume management layout ...200 // Using the LVM in Linux ...201 // Taking a snapshot ...202 // Striping ...202 // Mirroring ...202 // Using the Linux LVM ...203 // Defining physical volumes ...203 // Creating volume groups ...205 // Creating logical volumes ...206 // Creating the filesystem ...208 // Modifying the LVM ...209 // Summary ...210 // Chapter 9: Installing Software ...211 // Package Management Primer ...211 // The Debian-Based Systems ...212 // Managing packages with aptitude ...212 // Installing software packages with aptitude ...215 // Updating software with aptitude ...217 // Uninstalling software with aptitude ...218 // The aptitude repositories ...219 // The Red Hat-Based Systems ...221 // Listing installed packages ...221 // Installing software with yum ...223 // Updating software with yum ...224 // Uninstalling software with yum ...225 // Dealing with broken dependencies ...225 // Yum repositories ...227 // Installing from Source Code ...228 // Summary ...232 // Chapter 10: Working with Editors ...233 // Visiting the vim Editor ...233 // Checking your vim package ...234 // Exploring vim basics ...235 // Editing data ...238 // Copying and pasting ...238 // Searching and substituting ...239 // Navigating the nano Editor ...240 // Exploring the emacs Editor ...242 // Checking your emacs package ...243 // Using emacs on the console ...245 // Exploring the basics of emacs ...245 // Editing data ...247 // Copying and pasting ...247 // Searching and replacing ...248 // Using buffers in emacs ...248 // Using windows in console mode emacs ...249 // Using emacs in a GUI ...250 // Exploring the KDE Family of Editors ...251 //

Looking at the KWrite editor ...251 // Looking at the Kate editor ...256 // Exploring the GNOME Editor ...260 // Starting gedit ...260 // Understanding basic gedit features ...262 // Setting preferences ...262 // Setting view preferences ...262 // Setting editor preferences ...263 // Setting font & color preferences ...264 // Managing plug-ins ...264 // Summary ...265 // Part II: Shell Scripting Basics 267 // Chapter 11: Basic Script Building ...269 // Using Multiple Commands ...269 // Creating a Script File ...270 // Displaying Messages ...272 // Using Variables ...274 // Environment variables ...274 // User variables ...275 // Command substitution ...277 // Redirecting Input and Output ...279 // Output redirection ...279 // Input redirection ...280 // Pipes ...281 // Performing Math ...285 // The expr command ...285 // Using brackets ...287 // A floating-point solution ...288 // Contents // The basics of be ...288 // Using be in scripts ...289 // Exiting the Script ...292 // Checking the exit status ...292 // The exit command ...293 // Summary ...295 // Chapter 12: Using Structured Commands ...297 // Working with the if-then Statement ...297 // Exploring the if-then-else Statement ...300 // Nesting ifs // Trying the test Command ...304 // Using numeric comparisons ...307 // Using string comparisons ...308 // Looking at string equality ...309 // Looking at string order ...310 // Looking at string size ...312 // Using file comparisons ...313 // Checking directories ...314 // Checking whether an object exists ...315 // Checking for a file ...316 // Checking for read access ...317 // Checking for empty files ...318 // Checking whether you can write to a file ...319 // Checking whether you can run a file ...321 // Checking ownership ...321 // Checking default group membership ...322 // Checking file date ...322 // Considering Compound Testing ...324 //

Working with Advanced if-then Features ...325 // Using double parentheses ...325 // Using double brackets ...326 // Considering the case Command ...327 // Summary // Chapter 13: More Structured Commands ...331 // The for Command // Reading values in a list ...332 // Reading complex values in a list ...333 // Reading a list from a variable ...335 // Reading values from a command ...336 // Changing the field separator ...337 // Reading a directory using wildcards ...339 // The ?-Style for Command ...34I // The C language for command ...341 // Contents // Using multiple variables ...342 // The while Command ...343 // Basic while format ...343 // Using multiple test commands ...344 // The until Command ...346 // Nesting Loops ...347 // Looping on File Data ...350 // Controlling the Loop ...351 // The break command ...352 // Breaking out of a single loop ...352 // Breaking out of an inner loop ...353 // Breaking out of an outer loop ...354 // The continue command ...355 // Processing the Output of a Loop ...358 // Practical Examples ...359 // Finding executable files ...359 // Creating multiple user accounts ...361 // Summary ...362 // Chapter 14: Handling User Input ...365 // Passing Parameters ...365 // Reading parameters ...366 // Reading the script name ...368 // Testing parameters ...370 // Using Special Parameter Variables ...371 // Counting parameters ...371 // Grabbing all the data ...373 // Being Shifty ...375 // Working with Options ...376 // Finding your options ...376 // Processing simple options ...377 // Separating options from parameters ...378 // Processing options with values ...379 // Using the getopt command ...380 // Looking at the command format ...381 // Using getopt in your scripts ...382 // Advancing to getopts ...384 // Standardizing Options ...387 // Getting User Input ...388 // Reading basics ...388 // Timing out ...389 //

Reading with no display ...391 // Reading from a file ...391 // Summary ...392 // Chapter 15: Presenting Data ...395 // Understanding Input and Output ...395 // Standard file descriptors ...395 // STDIN ...396 // STD OUT ...397 // STDERR ...398 // Redirecting errors ...398 // Redirecting errors only ...398 // Redirecting errors and data ...399 // Redirecting Output in Scripts ...400 // Temporary redirections ...400 // Permanent redirections ...401 // Redirecting Input in Scripts ...402 // Creating Your Own Redirection ...403 // Creating output file descriptors ...403 // Redirecting file descriptors ...404 // Creating input file descriptors ...405 // Creating a read/write file descriptor ...406 // Closing file descriptors ...407 // Listing Open File Descriptors ...408 // Suppressing Command Output ...410 // Using Temporary Files ...411 // Creating a local temporary file ...411 // Creating a temporary file in /tmp ...413 // Creating a temporary directory ...413 // Logging Messages ...414 // Practical Example ...416 // Summary ...418 // Chapter 16: Script Control ...419 // Handling Signals ...419 // Signaling the bash shell ...419 // Generating signals ...420 // Interrupting a process ...420 // Pausing a process ...421 // Trapping signals ...422 // Trapping a script exit ...423 // Modifying or removing a trap ...424 // Running Scripts in Background Mode ...427 // Running in the background ...427 // Running multiple background jobs ...429 // Running Scripts without a Hang-Up ...430 // Controlling the Job ...432 // Viewing jobs ...432 // Restarting stopped jobs ...434 // Being Nice ...436 // Using the nice command ...436 // Using the renice command ...437 // Running Like Clockwork ...438 // Scheduling a job using the at command ...438 // Understanding the at command format ...438 // Retrieving job output ...439 // Listing pending jobs ...440 //

Removing jobs ...441 // Scheduling regular scripts ...441 // Looking at the cron table ...441 // Building the cron table ...442 // Viewing cron directories ...443 // Looking at the anacron program ...443 // Starting scripts with a new shell ...445 // Summary ...446 // Part III: Advanced Shell Scripting 447 // Chapter 17: Creating Functions ...449 // Basic Script Functions ...449 // Creating a function ...450 // Using functions ...450 // Returning a Value ...453 // The default exit status ...453 // Using the return command ...454 // Using function output ...455 // Using Variables in Functions ...456 // Passing parameters to a function ...456 // Handling variables in a function ...459 // Global variables ...459 // Local variables ...460 // Array Variables and Functions ...461 // Passing arrays to functions ...461 // Returning arrays from functions ...463 // Function Recursion ...464 // Creating a Library ...465 // Using Functions on the Command Line ...467 // Creating functions on the command line ...468 // Defining functions in the .bashrc file ...468 // Directly defining functions ...469 // Sourcing function files ...469 // Following a Practical Example ...470 // Downloading and installing ...471 // Building the library ...471 // The shtool library functions ...472 // Using the library ...473 // Summary ...474 // Chapter 18: Writing Scripts for Graphical Desktops ...477 // Creating Text Menus ...477 // Create the menu layout ...478 // Create the menu functions ...479 // Add the menu logic ...480 // Putting it all together ...481 // Using the select command ...482 // Doing Windows ...484 // The dialog package ...484 // The msgbox widget ...486 // The yesno widget ...487 // The inputbox widget ...487 // The textbox widget ...„488 // The menu widget ...489 // The fselect widget ...490 // The dialog options ...491 // Using the dialog command in a script ...493 //

Getting Graphic ...496 // The KDE environment ...496 // kdialog widgets ...496 // Using kdialog ...498 // The GNOME environment ...500 // zenity widgets ...500 // Using zenity in scripts ...501 // Summary ...504 // Chapter 19: Introducing sed and gawk ...505 // Manipulating Text ...505 // Getting to know the sed editor ...505 // Defining an editor command in the command line ...506 // Using multiple editor commands in the command line ...507 // Reading editor commands from a file ...508 // Getting to know the gawk program ...509 // Visiting the gawk command format ...510 // Reading the program script from the command line ...510 // Using data field variables ...511 // Using multiple commands in the program script ...512 // Reading the program from a file ...513 // Running scripts before processing data ...514 // Running scripts after processing data ...514 // Commanding at the sed Editor Basics ...516 // Introducing more substitution options ...516 // Substituting flags ...516 // Replacing characters ...518 // Using addresses ...518 // Addressing the numeric line ...519 // Using text pattern filters ...520 // Grouping commands ...520 // Deleting lines ...521 // Inserting and appending text ...523 // Changing lines ...525 // Transforming characters ...527 // Printing revisited ...527 // Printing lines ...528 // Printing line numbers ...529 // Listing lines ...529 // Using files with sed ...530 // Writing to a file ...530 // Reading data from a file ...531 // Summary ...533 // Chapter 20: Regular Expressions ...535 // What Are Regular Expressions? ...535 // A definition ...535 // Types of regular expressions ...536 // Defining BRE Patterns ...537 // Plain text ...537 // Special characters ...539 // Anchor characters ...540 // Starting at the beginning ...540 // Looking for the ending ...541 // Combining anchors ...542 // The dot character ...542 //

Character classes ...543 // Negating character classes ...546 // Using ranges ...546 // Special character classes ...547 // The asterisk ...548 // Extended Regular Expressions ...549 // The question mark ...550 // The plus sign ...551 // Using braces ...551 // The pipe symbol ...553 // Grouping expressions ...553 // Regular Expressions in Action ...554 // Counting directory files ...554 // Validating a phone number ...556 // Contents // Parsing an e-mail address ...558 // Summary // Chapter 21: Advanced sed ...561 // Looking at Multiline Commands ...561 // Navigating the next command ...562 // Using the single-line next command ...562 // Combining lines of text ...563 // Navigating the multiline delete command ...566 // Navigating the multiline print command ...567 // Holding Space // Negating a Command ...569 // Changing the Flow // Branching // Testing // Replacing via a Pattern // Using the ampersand // Replacing individual words ...576 // Placing sed Commands in Scripts ...577 // Using wrappers // Redirecting sed output // Creating sed Utilities ...579 // Spacing with double lines ...579 // Spacing files that may have blanks ...580 // Numbering lines in a file ...581 // Printing last lines ...582 // Deleting lines ...584 // Deleting consecutive blank lines ...584 // Deleting leading blank lines ...585 // Deleting trailing blank lines ...586 // Removing HTML tags ...586 // Summary // Chapter 22: Advanced gawk ...59I // Using Variables // Built-in variables // The field and record separator variables ...592 // Data variables ...595 // User-defined variables // Assigning variables in scripts ...598 // Assigning variables on the command line ...599 // Working with Arrays ...600 // Defining array variables ...600 // Iterating through array variables ...601 // Deleting array variables ...602 // Contents // Using Patterns ...602 // Regular expressions ...603 //

The matching operator ...603 // Mathematical expressions ...604 // Structured Commands ...605 // The if statement ...605 // The while statement ...607 // The do-while statement ...608 // The for statement ...609 // Formatted Printing ...610 // Built-In Functions ...613 // Mathematical functions ...613 // String functions ...615 // Time functions ...616 // User-Defined Functions ...617 // Defining a function ...617 // Using your functions ...618 // Creating a function library ...619 // Working through a Practical Example ...620 // Summary ...621 // Chapter 23: Working with Alternative Shells ...623 // What Is the dash Shell? ...623 // The dash Shell Features ...624 // The dash command line parameters ...624 // The dash environment variables ...625 // Default environment variables ...626 // Positional parameters ...627 // User-defined environment variables ...627 // The dash built-in commands ...628 // Scripting in dash ...629 // Creating dash scripts ...629 // Things that don’t work ...629 // Using arithmetic ...629 // The test command ...630 // The function Command ...631 // The zsh Shell ...632 // Parts of the zsh Shell ...632 // Shell options ...632 // Built-in commands ...633 // Core built-in commands ...634 // Add-in modules ...636 // Viewing, adding, and removing modules ...637 // Scripting with zsh ...638 // Mathematical operations ...639 // Contents // Performing calculations ...639 // Mathematical functions ...640 // Structured commands ...640 // Functions ...641 // Summary // Part IV: Creating Practical Scripts 643 // Chapter 24 Writing Simple Script Utilities ...645 // Performing Archives ...645 // Archiving data files ...645 // Obtaining the required functions ...646 // Creating a daily archive location ...648 // Creating a daily archive script ...649 // Running the daily archive script ...651 // Creating an hourly archive script ...652 //

Running the hourly archive script ...655 // Managing User Accounts ...656 // Obtaining the required functions ...657 // Getting the correct account name ...657 // Creating a function to get the correct account name ...658 // Verifying the entered account name ...660 // Determining whether the account exists ...661 // Removing any account processes ...662 // Finding account files ...664 // Removing the account ...665 // Creating the script ...665 // Running the script ...671 // Monitoring Disk Space ...673 // Obtaining the required functions ...673 // Creating the script ...676 // Running the script ...677 // Summary // Chapter 25: Producing Scripts for Database, Web, and E-Mail ...681 // Using a MySQL Database // Using MySQL // Connecting to the server ...682 // The mysql commands ...683 // Creating a database ...685 // Creating a user account ...687 // Creating a table ...688 // Inserting and deleting data ...690 // Contents // Querying data ...691 // Using the database in your scripts ...692 // Logging into the server ...692 // Sending commands to the server ...693 // Formatting data ...696 // Using the Web ...697 // Installing Lynx ...698 // The lynx command line ...699 // The Lynx configuration file ...700 // Capturing data from Lynx ...701 // Using E-Mail ...704 // Summary ...708 // Chapter 26: Creating Fun Little Shell Scripts ...709 // Sending a Message ...709 // Understanding the required functions ...709 // Determining who is on the system ...710 // Allowing messages ...710 // Sending a message to another user ...711 // Creating the script ...712 // Checking if user is logged on ...713 // Checking if user accepts messages ...714 // Checking if message was included ...715 // Transmitting a simple message ...715 // Transmitting a long message ...716 // Obtaining a Quote ...720 // Understanding the required functions ...720 //

Learning about the wget utility ...720 // Testing a web address ...723 // Creating the script ...724 // Checking the passed URL ...724 // Obtaining web page information ...726 // Parsing out the desired information ...727 // Generating an Excuse ...731 // Understanding the required functions ...732 // Learning about curl ...732 // Choosing to use e-mail ...734 // Creating the script ...735 // Summary ...737 // Appendix A: Quick Guide to bash Commands ...739 // Appendix B: Quick Guide to sed and gawk ...751 // Index ...763

(OCoLC)910936447