Linux Command Line

  1. Introduction to Shell Scripting
    1. Creating Scripts
      1. Shebang Line
        1. Writing Scripts
          1. Saving Scripts
            1. Making Scripts Executable
              1. Running Scripts
                1. From Current Directory
                  1. From PATH
                2. Variables in Scripts
                  1. Defining Variables
                    1. Using Variables
                      1. Variable Naming Rules
                        1. Quoting Variables
                          1. Positional Parameters
                            1. Special Variables
                              1. Number of Arguments
                                1. All Arguments
                                  1. Exit Status
                                    1. Process ID
                                      1. Script Name
                                    2. Command Substitution
                                      1. Using $() Syntax
                                        1. Using Backticks (Legacy)
                                          1. Nesting Command Substitutions
                                          2. Control Structures
                                            1. Conditional Statements
                                              1. If-Then-Else Statements
                                                1. Elif Clauses
                                                2. Case Statements
                                                  1. Pattern Matching
                                                  2. Loop Structures
                                                    1. For Loops
                                                      1. While Loops
                                                      2. Loop Control
                                                        1. Break Statement
                                                          1. Continue Statement
                                                        2. User Input
                                                          1. Read Command
                                                            1. Reading into Variables
                                                              1. Prompting Users
                                                              2. Functions
                                                                1. Defining Functions
                                                                  1. Calling Functions
                                                                    1. Function Arguments
                                                                      1. Return Values
                                                                        1. Variable Scope in Functions

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                                                                      12. Shell Environment and Customization

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                                                                      1. Introduction to the Command Line