Forouzan, Behrouz A. <br/><br/>
UNIX and Shell programming : a textbook / 
Behrouz A. Forouzan and Richard F. Gilberg. 
 - Pacific Grove, CA :  Brooks/Cole-Thomson Learning,  c2003. 
 - xix, 875 p. :  ill. (some col.) ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><br/>1.1 Why UNIX? 3<br/>Portable 3<br/>Multiuser 3<br/>Multitasking 3<br/>Networking 4<br/>Organized File System 4<br/>Device Independence 4<br/>Utilities 4<br/>Services 4<br/>1.2 Computer System 4<br/>Hardware 5<br/>Software 5<br/>The Operating System 6<br/>1.3 The UNIX Environment 6<br/>Personal Environment 6<br/>Time-Sharing Environment 7<br/>Client/Server Environment 7<br/>1.4 UNIX Structure 8<br/>The Kernel 8<br/>The Shell 8<br/>Utilities 9<br/>Applications 10<br/>1.5 Accessing UNIX 10<br/>User ID 10<br/>Passwords 10<br/>Interactive Session 11<br/>1.6 Commands 13<br/>Basic Concepts 13<br/>1.7 Common Commands 15<br/>Date and Time (date) Command 15<br/>Calendar (cal) Command 17<br/>Who's Online (who) Command 18<br/>whoami 20<br/>Change Password (passwd) Command 20<br/>Print Message (echo) Command 21<br/>Online Documentation (man) Conunand 22<br/>Print (Ipr) Command 23<br/>1.8 Other Useful Commands 24<br/>Terminal (tty) Command 24<br/>Clear Screen (clear) Command 25<br/>Set Terminal (stty) Command 25<br/>Record Session (script) Command 27<br/>System Name (uname) Command 28<br/>Calculator (be) Command 29<br/>1.9 Key Terms 32<br/>1.10Tips 32<br/>1. 11 Commands 33<br/>1.12 Summary 34<br/>1.13 Practice Set 35<br/>Review Questions 35<br/>Exercises 36<br/>1.14 Lab Sessions 37<br/>^asoc m 4 i<br/>2.1 Editor Concepts 41<br/>Line Editors 41<br/>Screen Editors 41<br/>2.2 The vi Editor 42<br/>2.3 Modes 42<br/>Command Mode 43<br/>Text Mode 43<br/>Changing Modes 43<br/>2.4 Commands 44<br/>Add Commands 44<br/>Cursor Move Commands 46<br/>Deletion Commands 50<br/>Join Command 50<br/>Scrolling Commands 51<br/>Undo Commands 53<br/>Saving and Exit Commands 54<br/>2.5 Two Practice Sessions 55<br/>2.6 Key Terms 57<br/>2.7 Tips 57<br/>2.8 Commands 57<br/>2.9 Summary 58<br/>2.10 Practice Set 60<br/>Review Questions 60<br/>Exercises 60<br/>2.11 Lab Sessions 62<br/>Fe^e Systems 6S<br/>3.1 Filenames 65<br/>Wildcards 66<br/>3.2 File Types 68<br/>3.3 Regular Files 69<br/>Text Files 69<br/>Binary Files 69<br/>3.4 Directories 70<br/>Special Directories 70<br/>Paths and Pathnames 71<br/>Relative Pathname Abbreviations 72<br/>3.5 File System Implementation 75<br/>File Systems 76<br/>Directory Contents 77<br/>Links 77<br/>3.6 Operations Unique to Directories 80<br/>Locate Directory (pwd) Command 80<br/>List Directory (Is) Command 81<br/>Make Directory (mkdir) Command 86<br/>Change Directory (cd) Command 88<br/>Remove Directory (rmdir) Command 89<br/>3.7 Operations Unique to Regular Files 89<br/>■ Create File 89<br/>Edit File 89<br/>Display File (more) Command 90<br/>Print File 92<br/>3.8 Operations Common to Both 93<br/>Copy (cp) Command 93<br/>Move (mv) Command 100<br/>Rename (mv) Command 102<br/>Link (In) Command 102<br/>Remove (rm) Command 106<br/>3.9 Key Terms 112<br/>3.10 Tips 112<br/>3.11 Commands 113<br/>3.12 Summary 114<br/>3.13 Practice Set 115<br/>Review Questions 115<br/>Exercises 116<br/>3.14 Lab Sessions 119<br/>Chapter 4<br/>Security and<br/>FiSe Perai^ss9©8? ! 11<br/>4.1 Users and Groups 121<br/>Group (groups) Command 121<br/>4.2 Security Levels 122<br/>System Security 122<br/>Permission Codes 123<br/>Checking Permissions 126<br/>4.3 Changing Permissions 126^<br/>Symbolic Codes 127<br/>Octal Codes 128<br/>Option 130<br/>4.4 User Masks 131<br/>Basic Concept 131<br/>User Mask (umask) Command 132<br/>4.5 Changing Ownership and Group 132<br/>Change Ownership (chown) Command 133<br/>Change Group (chgrp) Command 133<br/>4.6KeyTerms 134<br/>4.7 Commands 134<br/>4.8 Tips 135<br/>4.9 Summary 135<br/>4.10 Practice Sets 136<br/>Review Questions 136<br/>Exercises 138<br/>4.11 Lab Sessions 140<br/>SgntiTsdiBfStk&in} to Sii'33S^-i<br/>5.1 UNIX Session 144<br/>Login Shell Verification 145<br/>Current Shell Verification 145<br/>Shell Relationships 145<br/>Logout 146<br/>5.2 Standard Streams 146<br/>5.3 Redirection 147<br/>Redirecting Input 147<br/>Redirecting Output 148<br/>Redirecting Errors 149<br/>5.4 Pipes 151<br/>5.5 tee Command 153<br/>5.6 Command Execution 154<br/>Sequenced Commands 155<br/>Grouped Commands 155<br/>Chained Commands 156<br/>Conditional Commands 156<br/>5.7 Command-Line Editing 156<br/>Command-Line Editing Concept 157<br/>Editor Selection 157<br/>vi Command-Line Editor 157<br/>Using the Conrunand-Line Editor 159<br/>5.8 Quotes 159<br/>Backslash 160<br/>Double Quotes 161<br/>Single Quotes 163<br/>5.9 Command Substitution 164<br/>5.10 Job Control 165<br/>Jobs 165<br/>Foreground and Background Jobs 165<br/>jobsConunand 168<br/>Process ID 170<br/>5.11 Aliases 170<br/>Aliases in the Kom and Bash Shells 171<br/>Aliases in the C Shell 174<br/>Alias Summary 176<br/>5.12 Variables 176<br/>User-Defined Variables 176<br/>Predefined Variables 177<br/>Storing Data in Variables 177<br/>Accessing a Variable 178<br/>5.13 Predefined Variables 178<br/>Handling Variables 181<br/>5.14 Options 183<br/>Handling Options 184<br/>5.15 Shell/Environment<br/>Customization 185<br/>Temporary Customization 185<br/>Permanent Customization 185<br/>Summary 187<br/>5.16 Key Terms 188<br/>5.17 Tips 188<br/>5.18 Commands 189<br/>5.19 Summary 191<br/>5.20 Practice Set K92<br/>Review Questions 192<br/>Exercises 193<br/>5.21 Lab Sessions 197<br/>COnapteif 6<br/>FiSteE's f!<br/>6.1 Filters and Pipes 202<br/>6.2 Concatenating Files 202<br/>Catenate (cat) Command 202<br/>cat Options 205<br/>6.3 Display Beginning and End<br/>of Files 207<br/>head Command 207<br/>tail Command 208<br/>6.4 Cut and Paste 210<br/>cut Command 210<br/>paste Command 214<br/>6.5 Sorting 217<br/>sort Command 217<br/>Sort by Lines 217<br/>Sdrt by Fields 219<br/>Options 222<br/>Multiple-Pass Sorting 227<br/>6.6 Translating Characters 230<br/>tr Command 230<br/>Simple Translate 230<br/>Nonmatching Translate Strings 231<br/>Delete Characters 231<br/>Squeeze Output 231<br/>Complement 232<br/>6.7 Flies with Duplicate Lines 233<br/>uniqConunand 233<br/>Output Format 234<br/>Skip Leading Fields 236<br/>Skip Leading Characters 236<br/>6.8 Count Characters, Words,<br/>or Lines 237<br/>wc Command 237<br/>6.9 Comparing Flies 238<br/>Compare (cmp) Command 238<br/>Difference (diff) Command 240<br/>Common (conun) Command 243<br/>6.10 Key Terms 244<br/>6.1 i Tips 244<br/>6.12 Commands 245<br/>6.13 Summary 246<br/>6.14 Practice Set 247<br/>Review Questions 247<br/>Exercises 248<br/>4.15 Lab Sessions 252<br/>Ciiapter 1<br/>€©mBiniim^Q€ait3®ins<br/>%%1<br/>7.1 User Communication 257<br/>talk Command 257<br/>write Conunand 260<br/>7.2 Electronic Mail 262<br/>Mail Addresses 262<br/>Mail Mode 265<br/>mail Command 265<br/>Send Mail 265<br/>Read Mode 270<br/>Read Mail Options 275<br/>Mail Files 275<br/>7.3 Remote Access 276<br/>The telnet Concept 276<br/>Connecting to the Remote<br/>Host 278<br/>7.4 File Transfer 279<br/>The ftp Command 279<br/>Establishing ftp Connection 280<br/>Closing an ftp Connection 280<br/>Transferring Files 281<br/>7.5 Key Terms 282<br/>7.6 Commands 283<br/>7.7 Tips 283<br/>7.8 Summary 284<br/>7.9 Practice Set 285<br/>Review Questions 285<br/>Exercises 286<br/>7.10 Lab Sessions 287<br/>CBnaipter ®<br/>vi GX 19 D<br/>8.1 vl Editor 292 ^<br/>Commands 292<br/>Conunand Categories 293<br/>8.2 Local Commands<br/>in vi 293<br/>Insert Text Conunands (i, I) 293<br/>Append Text Comniands (a. A) 293<br/>Newline Conunands (o, O) 294<br/>Replace Text Commands (r, R) 294<br/>Substitute Text Conunands (s, S) 295<br/>*  Delete Character<br/>Conunands (x, X) 295<br/>Mark Text Command (m) 296<br/>Change Case Command (~) 296<br/>Put Commands (p, ?) 297<br/>Join Conunand (J) 298<br/>8.3 Range Commands in vi 299<br/>Text Object 299<br/>Text Object Conunands 304<br/>Yank Conunand 306<br/>Range Command Summary 307<br/>8.4 Global Commands in vi 307<br/>Scroll Commands 307<br/>Undo Commands 307<br/>Repeat Command 308<br/>Screen Regeneration Commands 308<br/>Display Document Status Line 308<br/>Save and Exit Commands 309<br/>8.5 Rearrange Text in vi 309<br/>Move Text. 309<br/>Copy Text 309<br/>Named Buffers 310<br/>8.6 ex Editor 311<br/>ex Instruction Format 311<br/>Addresses 312<br/>Commands 316<br/>8.7 Key Terms 320<br/>8.8 Tips 320<br/>8.9 Commands 321<br/>8.10 Summary 323<br/>8.11 Practice Set 324<br/>Review Questions 324<br/>Exercises 325<br/>8.12 Lab Sessions 326<br/>Chaptcir 9<br/>Kegaaiar 33 B<br/>9.1 Atoms 331<br/>Single Character 332<br/>Dot 332<br/>Class 333<br/>Anchors 334<br/>Back References 335<br/>9.2 Operators 335<br/>Sequence 335<br/>Alternation 337<br/>Repetition 337<br/>Group Operator 341<br/>Save 342<br/>9.3 Key Terms 343<br/>9.4 Tips 343<br/>9.5 Summary 344<br/>9.6 Practice Set 344<br/>Review Questions 344<br/>Exercises 345<br/>CSnapte:." 1 ©<br/>giy-ejn)<br/>10.1 Operation 351<br/>grep flowchart 352<br/>grep Operation Example 352<br/>10.2 grep Family 354<br/>grep 355<br/>Fast grep 356<br/>Extended grep 356<br/>10.3 Examples 359<br/>10.4 Searching for File Content 362<br/>Search a Specific Directory 362<br/>Search All Directories in a Path 363<br/>10.5 Key Terms 364<br/>10.6 Tips 364<br/>10.7 Commands 365<br/>10.8 Summary 365<br/>10.9 Practice Set 366<br/>/<br/>Review Questions 366<br/>Exercises 366<br/>10.10 Lab Sessions 368<br/>CBuiapjteir B i<br/>sesi 373<br/>11.1 Scripts 373<br/>Script Formats 374<br/>Instruction Format 374<br/>Comments 374<br/>11.2 Operation 375<br/>11.3 Addresses 377<br/>Single-Line Addresses 378<br/>Set-of-Line Addresses 379<br/>Range Addresses 380<br/>Nested Addresses 381<br/>11.4 Commands 381<br/>Line Number Command 381<br/>Modify Commands 382<br/>Substitute Command (s) 386<br/>Substitute Flags 39!<br/>Transform Command (y) 393<br/>Input and Output Commands 394<br/>File Commands 399<br/>Branch Commands 401<br/>Hold Space Commands 404<br/>Quit 405<br/>11.5 Applications 406<br/>Delete Lines 406<br/>Delete Text 408<br/>11.6 grep and sed 409<br/>Lines That Match a Regular<br/>Expression 409<br/>Lines That Do Not Match a Regular<br/>Expression 410<br/>11.7 Key Terms 411<br/>11.8 Tips 411<br/>11.9 Commands 412<br/>11.10 Summary 413<br/>11.11 Practice Set 414<br/>Review Questions 414<br/>Exercises 416<br/>11.12 Lab Sessions 421<br/>Chapter 12<br/>awk 42S<br/>12.1 Execution 425<br/>12.2 Fields and Records 426<br/>Buffers and Variables 426<br/>Variables 427<br/>12.3 Scripts 428<br/>Initialization Processing<br/>(BEGIN) 428<br/>Body Processing 429<br/>End Processing (END) 429<br/>12.4 Operation 429<br/>12.5 Patterns 431<br/>Simple Patterns 432<br/>Nothing (No Pattern) 436<br/>Range Patterns 436<br/>12.6 Actions 438<br/>Expression Statement 439<br/>Output Statements 440<br/>Decision Statements 444<br/>Control Actions 446<br/>Loops 449<br/>12.7 Associative Arrays 453<br/>Processing Arrays 454<br/>Delete Array Entry 459<br/>12.8 String Functions 459<br/>Length 460<br/>Index 460<br/>Substring 461<br/>Split 463<br/>Substitution 464<br/>Global Substitution 465<br/>Match 466<br/>ToupperandToIower 466<br/>12.9 Mathematical<br/>Functions 467<br/>12.10 User-Defined<br/>Functions 468<br/>12.11 Using System Commands in<br/>awk 469<br/>Using Pipes 469<br/>Using the System Function 471<br/>12.12 Applications 472<br/>Phone List 472<br/>Count Lines and Words 473<br/>Print Line Following a Blank<br/>Line 473<br/>Print Line Before a Blank<br/>Line 474<br/>Merge Files 474<br/>12.13 awk and grep 475<br/>Find the Line That Matches a Regular<br/>Expression 475<br/>Find the Line That Does Not Match a Regular<br/>Expression 476<br/>12.14 sed and awk 477<br/>Print Line Numbers 477<br/>Modify a Line 478<br/>Substitute 479<br/>Transform 479<br/>Input/Output 480<br/>Files 480<br/>Branch 480<br/>Quit 480<br/>12.15 Key Terms 481<br/>12.16 Tips 481<br/>12.17 Commands 482<br/>12.18 Summary 483<br/>12.19 Practice Set 484<br/>Review Questions 484<br/>Exercises 486<br/>12.20 Lab Sessions 488<br/>Ctepter 13<br/>13.1 Kom Shell Features 499<br/>Kom Shell Sessions 499<br/>Standard Streams 499<br/>Redirection 499<br/>Pipes 500<br/>tee Command 500<br/>Combining Commands 501<br/>Command-Line Editing 501<br/>Quotes 501<br/>Conunand Substitution 501<br/>Job Control 501<br/>Aliases 502<br/>13.2 Two Special Files 502<br/>Trash File (/dev/null) 502<br/>Terminal File (/dev/tty) 503<br/>13.3 Variables 504<br/>User-Defined Variables 504<br/>Predefined Variables 505<br/>Storing Values in Variables 505<br/>Accessing the Value of a Variable 506<br/>Null Variables 507<br/>Unsetting a Variable 508<br/>Storing Filenames 508<br/>Storing File Contents 508<br/>Storing Commands in a Variable 509<br/>Read-Only Variables 509<br/>Exporting Variables 510<br/>Variable Attribute: The typeset<br/>Conunand 512<br/>13.4 Output 514<br/>13.5 Input 516<br/>Reading Word by Word 517<br/>Reading Line by Line 517<br/>Reading from a File 518<br/>13.6 Exit Status of a Command 518<br/>13.7 eval Command 519<br/>13.8 Environmental Variables 521<br/>Change Directory Path (CDPATH) 522<br/>ffistory File Path (HISTFILE) 522<br/>Home Path (HOME) 523<br/>Login Name (LOGNAME) 523<br/>Mailbox Pathname (MAIL) 523<br/>Mail Check Interval (MAILCHECK) -§§4<br/>Incoming Mail Paths (MAILPATH) 524<br/>Directory Search Paths (PATH) 524<br/>Primary Prompt (PSI) 524<br/>Secondary Prompt (PS2) 526<br/>Third Prompt (PS3) 526<br/>Fourth Prompt (PS4) 526<br/>User Input Default Variable (REPLY) 526<br/>Login Shell Path (SHELL) 527<br/>Terminal Description (TERM) 527<br/>Handling Environmental Variables 527<br/>13.9 Options 528<br/>Export All (allexport) 528<br/>Command-Line Editor (emacs and vi) 528<br/>Ignore End-of-File (ignoreeof) 529<br/>No Clobber in Redirection (noclobber) 529<br/>No Execute (noexec) 529<br/>No Global (noglob) 529<br/>Verbosity (verbose) 529<br/>Execute Trace (xtrace) 530<br/>Handling Options 530<br/>13.10 Startup Scripts 530<br/>System Profile File 530<br/>Personal Profile File 531<br/>Environment File 531<br/>Startup Process 532<br/>13.11 Command History 532<br/>History File 532<br/>History Command 533<br/>Redo Command (r) 535<br/>Substitution in Redo Command 536<br/>13.12 Command Execution<br/>Process 536<br/>Execution Steps 536<br/>Command Execution Example 537<br/>13.13 Key Terms 537<br/>13.14 Tips 538<br/>13. f 5 Commands 539<br/>13.16 Summary 540<br/>13.17 Practice Set 541<br/>Review Questions 541<br/>Exercises 542<br/>13.18 Lab Sessions 544<br/>CilDapteir 04<br/>toirra SMIl<br/>14.1 Basic Script Concepts 547<br/>Script Components 547<br/>Making Scripts Executable 549<br/>Executing the Script 549<br/>Script Termination (exit Command) 553<br/>Arguments and Positional Parameters 554<br/>14.2 Expressions 555<br/>Mathematical Expressions 556<br/>'  Relational Expressions 557<br/>File Expressions 559<br/>Logical Expressions 560<br/>Expression Type Summary 562<br/>14.3 Decisions: Making Selections 562<br/>if-then-else 562<br/>Multiway Selection 567<br/>14.4 Repetition 571<br/>Command-Controlled and List-Controlled<br/>Loops 571<br/>Background Loops 580<br/>Loop Redirection 580<br/>14.5 Special Parameters and<br/>Variables 585<br/>Special Parameters 585<br/>Special Variables 588<br/>Special Parameter and Variable<br/>Summary 588<br/>14.6 Changing Positional<br/>Parameters 589<br/>shift Command 591<br/>14.7 Argument Validation 593<br/>Number of Arguments Validation 593<br/>Type of Argument Validation 594<br/>14.8 Debugging Scripts 597<br/>Debug Options Included in the Script 597<br/>Debug Options on the Command Line 598<br/>14.9 Script Examples 601<br/>Cat 601<br/>Copy 603<br/>14.10 Key Terms 604<br/>14.11 Tips 605<br/>14.12 Commands 605<br/>14.13 Summary 607<br/>14.14 Practice Set 608<br/>Review Questions 608<br/>Exercises 609<br/>14.15 Lab Sessions 613<br/>C&napiseir IS<br/>$3^eSi<br/>P'rfSgrammoBig 6 8 7<br/>15.1 Variable Evaluation and<br/>Substitution 617<br/>Variabje Evaluation 617<br/>Variable Substitution 618<br/>15.2 String Manipulation 622<br/>Compress Strings 622<br/>String L.ength 623<br/>Locating a Substring in a<br/>String 624<br/>Extraa Substnng 625<br/>Stripping Strings 626<br/>Using Other Utilities 627<br/>15.3 Here Document 628<br/>15.4 Functions 629<br/>Writing Functions 629<br/>Returning Values 631<br/>Comparing Strings 632<br/>Functions in Files 633<br/>15.5 Arrays 635<br/>15.6 Signals 636<br/>Signal Types 636<br/>Response to Signals 637<br/>trap Command 638<br/>15.7 Built-in Commands 639<br/>Sleep Command 640<br/>Dot Command 641<br/>15.8 Scripting Techniques 641<br/>Reading Strings 641<br/>User Interaction 642<br/>Parsing Options 644<br/>Parsing Pathnames 648<br/>Opening and Closing Files 651<br/>15.9 Shell Environment and<br/>Script 655<br/>15.10 Script Examples 656<br/>Calculate 656<br/>Reverse 658<br/>Add Column 659<br/>15.11 Key Terms 661<br/>15.12 Tips 661<br/>15.13 Commands 662<br/>15.14 Summary 663<br/>15.15 Practice Set 664<br/>Review Questions 664<br/>Exercises 665<br/>15.16 Lab Sessions 666<br/>"  t ;' ■ C i<br/>16.1 C Shell Features .671<br/>C Shell Sessions 671<br/>Standard Streams 671<br/>Redirection 671<br/>Pipes 672<br/>tee Command 672<br/>Combining Commands 673<br/>Command-Line Editing 673<br/>Quotes 673<br/>Command Substitution 673<br/>Job Control 674<br/>Aliases in the C Shell 674<br/>16.2 Two Special Files 676<br/>Trash File (/dev/null) 676<br/>Terminal File (/dev/tty) 677<br/>16.3 Variables 679<br/>User-Defined Variables 679<br/>Predefined Variables 679<br/>Storing Values in Variables 680<br/>Accessing the Value of a Variable 681<br/>Null Variables 681<br/>Unsetting a Variable 682<br/>Storing Filenames 682<br/>Storing File Contents 683<br/>Storing Conunands in a Variable 683<br/>Exporting Variables 684<br/>16.4 Output 686<br/>16.5 Input 688<br/>Reading Line by Line 688<br/>Reading Word by Word 688<br/>16.6 Exit Status of a Command 688<br/>16.7 eval Command 689<br/>16.8 Environmental Variables 690<br/>Handling Environmental Variables 694<br/>16.9 On-Off Variables 695<br/>Handling On-Off Variables 697<br/>16.10 Startup and Shutdown Scripts 697<br/>System Startup Files 698<br/>Personal Startup Files 698<br/>Startup Process 698<br/>Shutdown Files 698<br/>16.11 Command History 699<br/>History File 699<br/>History Command 699<br/>Reexecuting Previous Commands 700<br/>Substitute and Reexecute 701<br/>Using Arguments from Previous<br/>Command 702<br/>History Modifier 702<br/>Pathname Modifier 703<br/>History Command Summary 703<br/>16.12 Command Execution<br/>Scripts 704<br/>Execution Steps 704<br/>Command Execution Example 70S<br/>16.13 Key Terms 706<br/>16.14 Tips 706<br/>16.15 Commands 707<br/>16.16 Summary 707<br/>16.17 Practice Set 709<br/>Review Questions 709<br/>Exercises 710<br/>16.18 Lab Sessions 711<br/>€ SlhieOg 1S S<br/>17.1 Basic Script Concepts 715<br/>Script Components 715<br/>Making Scripts Executable 717<br/>Executing the Script 717<br/>Script Termination (exit Command) 72.1<br/>Arguments and Positional Parameters 722<br/>17.2 Expressions 723<br/>Mathematical Expressions 724<br/>Relational Exjpressioiis 725<br/>File Expressions 726<br/>Logical Expressions 727<br/>i7;3 Decisions: Making Selections 728<br/>if-then-else 728<br/>Multiway Selection 732<br/>17.4 Repetition 736<br/>C Shell Loops 736<br/>17.5 Special Parameters 742<br/>Script Name ($0) 743<br/>Number of Arguments ($#argv) 743<br/>All Parameters ($argv) 743<br/>Special Parameter Summary 744<br/>17.6 Changing Positional Parameters 74<br/>shift Command 746<br/>17.7 Argument Validation 747<br/>Number of Arguments Validation 748<br/>Type of Argument Validation 749<br/>17.8 Debugging Scripts 752<br/>Debug Options Included in the Script 752<br/>Debug Options on the Command Line 753<br/>17.9 Script Examples 756<br/>Copy 756<br/>17.10 Key Terms 758<br/>17.11 Tips 758<br/>17.12 Commands 759<br/>17.13 Summary 760<br/>17.14 Practice Set 761<br/>Review Questions 761<br/>Exercises 761<br/>17.15 Lab Sessions 764<br/>CBiapteif fl B<br/>C SlaelQ<br/>Pr@graflW3maiR!g<br/>18.1 Variable Evaluation 769<br/>• 18.2 String Manipulation 769<br/>Compress Strings 770<br/>Using Other Utilities 771<br/>18.3 Here Document 772<br/>18.4 Signals 773<br/>Signal Types 773<br/>Response to Signals 774<br/>On Interrupt Command 774<br/>18.5 Built-in Commands 775<br/>Sleep Command 776<br/>Source Command 111<br/>18.6 Scripting Techniques 777<br/>Reading Strings 778<br/>User Interaction 778<br/>Parsing Pathnames 779<br/>18.7 Shell Environment and Script 780<br/>18.8 Arrays 781<br/>Creating an Array 782<br/>Parsing Input 783<br/>18.9 Script Examples 784<br/>Simulate find Command 784<br/>General Ledger System 786<br/>Eliminate Duplicates 789<br/>18.10 Key Terms 790<br/>18.11 Tips 790<br/>18.12 Commands 791<br/>18.13 Summary 791<br/>18.14 Practice Set 792<br/>Review Questions 792<br/>Exercises 792<br/>18.15 Lab Sessions 793 
<br/><br/><label>ISBN: </label>0534951597 (pbk. : acidfree) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating Systems (computers).
<br/><br/><label>Dewey Class. No.: </label>005.2/82  / FOR/U