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| Introduction | |
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| A Quick Review of the Basics | |
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| Some Basic Commands | |
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| Displaying the Date and Time: The date Command | |
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| Finding Out Who's Logged In: The who Command | |
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| Echoing Characters: The echo Command | |
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| Working with Files | |
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| Listing Files: The Is Command | |
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| Displaying the Contents of a File: The cat Command | |
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| Counting the Number of Words in a File: The wc Command | |
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| Command Options | |
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| Making a Copy of a File: The cp Command | |
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| Renaming a File: The mv Command | |
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| Removing a File: The rm Command | |
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| Working with Directories | |
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| The Home Directory and Pathnames | |
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| Displaying Your Working Directory: The pwd Command | |
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| Changing Directories: The cd Command | |
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| More on the Is Command | |
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| Creating a Directory: The mkdir Command | |
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| Copying a File from One Directory to Another | |
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| Moving Files Between Directories | |
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| Linking Files: The In Command | |
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| Removing a Directory: The rmdir Command | |
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| Filename Substitution | |
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| The Asterisk | |
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| Matching Single Characters | |
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| Standard Input/Output and I/O Redirection | |
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| Standard Input and Standard Output | |
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| Output Redirection | |
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| Input Redirection | |
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| Pipes | |
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| Filters | |
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| Standard Error | |
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| More on Commands | |
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| Typing More Than One Command on a Line | |
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| Sending a Command to the Background | |
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| The ps Command | |
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| Command Summary | |
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| Exercises | |
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| What Is the Shell? | |
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| The Kernel and the Utilities | |
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| The Login Shell | |
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| Typing Commands to the Shell | |
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| The Shell's Responsibilities | |
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| Program Execution | |
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| Variable and Filename Substitution | |
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| I/O Redirection | |
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| Pipeline Hookup | |
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| Environment Control | |
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| Interpreted Programming Language | |
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| Tools of the Trade | |
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| Regular Expressions | |
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| Matching Any Character: The Period (.) | |
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| Matching the Beginning of the Line: The Caret (^) | |
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| Matching the End of the Line: The Dollar Sign ($) | |
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| Matching a Choice of Characters: The [...] Construct | |
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| Matching Zero or More Characters: The Asterisk (*) | |
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| Matching a Precise Number of Characters: /{.../} | |
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| Saving Matched Characters: /(.../) | |
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| Cut | |
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| The -d and -f Options | |
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| Pste | |
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| The -d Option | |
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| The -s Option | |
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| Sed | |
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| The -n Option | |
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| Deleting Lines | |
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| Tr | |
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| The -s Option | |
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| The -d Option | |
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| Grep | |
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| Regular Expressions and grep | |
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| The -v Option | |
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| The -l Option | |
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| The -n Option | |
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| Sort | |
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| The -u Option | |
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| The -r Option | |
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| The -o Option | |
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| The -n Option | |
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| Skipping Fields | |
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| The -t Option | |
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| Other Options | |
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| Uniq | |
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| The -d Option | |
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| Other Options | |
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| Exercises | |
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| And Away We Go | |
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| Command Files | |
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| Comments | |
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| Variables | |
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| Displaying the Values of Variables | |
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| The Null Value | |
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| Filename Substitution and Variables | |
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| The ${variable} Construct | |
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| Built-in Integer Arithmetic | |
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| Exercises | |
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| Can I Quote You on That? | |
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| The Single Quote | |
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| The Double Quote | |
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| The Backslash | |
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| Using the Backslash for Continuing Lines | |
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| The Backslash Inside Double Quotes | |
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| Command Substitution | |
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| The Back Quote | |
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| The $(...) Construct | |
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| The expr Command | |
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| Exercises | |
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| Passing Arguments | |
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| The $# Variable | |
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| The $* Variable | |
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| A Program to Look Up Someone in the Phone Book | |
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| A Program to Add Someone to the Phone Book | |
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| A Program to Remove Someone from the Phone Book | |
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| ${n} | |
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| The shift Command | |
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| Exercises | |
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| Decisions, Decisions | |
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| Exit Status | |
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| The $? Variable | |
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| The test Command | |
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| String Operators | |
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| An Alternative Format for test | |
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| Integer Operators | |
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| File Operators | |
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| The Logical Negation Operator! | |
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| The Logical AND Operator -a | |
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| Parentheses | |
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| The Logical OR Operator -o | |
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| The else Construct | |
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| The exit Command | |
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| A Second Look at the rem Program | |
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| The elif Construct | |
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| Yet Another Version of rem | |
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| The case Command | |
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| Special Pattern Matching Characters | |
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| The -x Option for Debugging Programs | |
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| Back to the case | |
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| The Null Command | |
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| The && and II Constructs | |
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| Exercises | |
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| 'Round and 'Round She Goes | |
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| The for Command | |
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| The $@ Variable | |
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| The for Without the List | |
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| The while Command | |
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| The until Command | |
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| More on Loops | |
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| Breaking Out of a Loop | |
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| Skipping the Remaining Commands in a Loop | |
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| Executing a Loop in the Background | |
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| I/O Redirection on a Loop | |
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| Piping Data Into and Out of a Loop | |
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| Typing a Loop on One Line | |
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| The getopts Command | |
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| Exercises | |
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| Reading and Printing Data | |
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| The read Command | |
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| A Program to Copy Files | |
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| Special echo Escape Characters | |
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| An Improved Version of mycp | |
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| A Final Version of mycp | |
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| A Menu-Driven Phone Program | |
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| The $$ Variable and Temporary Files | |
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| The Exit Status from read | |
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| The printf Command | |
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| Exercises | |
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| Your Environment | |
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| Local Variables | |
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| Subshells | |
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| Exported Variables | |
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| export -p | |
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| PS1 and PS2 | |
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| HOME, James | |
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| Your PATH | |
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| Your Current Directory | |
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| CDPATH | |
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| More on Subshells | |
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| The . Command | |
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| The exec Command | |
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| The (...) and {...;} Constructs | |
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| Another Way to Pass Variables to a Subshell | |
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| Your .profile File | |
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| The TERM Variable | |
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| The TZ Variable | |
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| Exercises | |
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| More on Parameters | |
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| Parameter Substitution | |
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| ${parameter} | |
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| ${parameter:-value} | |
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| ${parameter:=value} | |
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| ${parameter:?value} | |
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| ${parameter:+value} | |
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| Pattern Matching Constructs | |
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| ${#variable} | |
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| The $0 Variable | |
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| The set Command | |
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| The -x Option | |
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| set with No Arguments | |
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| Using set to Reassign Positional Parameters | |
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| The--Option | |
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| Other Options to set | |
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| The IFS Variable | |
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| The readonly Command | |
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| The unset Command | |
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| Exercises | |
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| Loose Ends | |
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| The eval Command | |
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| The wait Command | |
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| The $! Variable | |
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| The trap Command | |
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| Trap with No Arguments | |
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| Ignoring Signals | |
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| Resetting Traps | |
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| More on I/O | |
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| [less than sign]&- and [greater than sign]&- | |
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| Inline Input Redirection | |
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| Shell Archives | |
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| Functions | |
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| Removing a Function Definition | |
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| The return Command | |
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| The type Command | |
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| Exercises | |
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| Rolo Revisited | |
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| Design Considerations | |
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| rolo | |
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| add | |
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| lu | |
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| display | |
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| rem | |
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| change | |
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| listall | |
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| Sample Output | |
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| Exercises | |
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| Interactive and Nonstandard Shell Features | |
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| Getting the Right Shell | |
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| The ENV File | |
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| Command-Line Editing | |
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| Command History | |
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| The vi Line Edit Mode | |
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| Accessing Commands from Your History | |
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| The Line Edit Mode | |
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| Accessing Commands from Your History | |
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| Other Ways to Access Your History | |
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| The history Command | |
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| The fc Command | |
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| The r Command | |
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| Functions | |
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| Local Variables | |
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| Automatically Loaded Functions | |
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| Integer Arithmetic | |
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| Integer Types | |
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| Numbers in Different Bases | |
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| The alias Command | |
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| Removing Aliases | |
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| Arrays | |
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| Job Control | |
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| Stopped Jobs and the fg and bg Commands | |
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| The Restricted Shell rsh | |
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| Miscellaneous Features | |
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| Other Features of the cd Command | |
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| Tilde Substitution | |
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| Order of Search | |
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| Compatibility Summary | |
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| Exercises | |
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| Shell Summary | |
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| Startup | |
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| Commands | |
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| Comments | |
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| Parameters and Variables | |
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| Shell Variables | |
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| Positional Parameters | |
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| Special Parameters | |
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| Parameter Substitution | |
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| Command Re-entry | |
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| The fc Command | |
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| vi Line Edit Mode | |
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| Quoting | |
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| Tilde Substitution | |
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| Arithmetic Expressions | |
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| Filename Substitution | |
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| I/O Redirection | |
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| Exported Variables and Subshell Execution | |
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| The (...) Construct | |
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| The {...;} Construct | |
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| More on Shell Variables | |
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| Functions | |
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| Job Control | |
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| Shell Jobs | |
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| Stopping Jobs | |
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| Command Summary | |
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| The : Command | |
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| The . Command | |
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| The alias Command | |
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| The bg Command | |
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| The break Command | |
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| The case Command | |
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| The cd Command | |
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| The continue command | |
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| The echo Command | |
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| The eval Command | |
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| The exec Command | |
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| The exit Command | |
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| The export Command | |
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| The false Command | |
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| The fc Command | |
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| The fg Command | |
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| The for Command | |
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| The getopts Command | |
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| The hash Command | |
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| The if Command | |
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| The jobs Command | |
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| The kill Command | |
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| The newgrp Command | |
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| The pwd Command | |
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| The read Command | |
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| The readonly Command | |
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| The return Command | |
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| The set Command | |
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| The shift Command | |
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| The test Command | |
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| The times Command | |
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| The trap Command | |
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| The true Command | |
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| The type Command | |
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| The umask Command | |
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| The unalias Command | |
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| The unset Command | |
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| The until Command | |
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| The wait Command | |
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| The while Command | |
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| For More Information | |
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| Online Documentation | |
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| Documentation on the Web | |
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| Books | |
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| O'Reilly & Associates | |
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| Sams and Que | |
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| Other Publishers | |