• Special Parameters

    calendar Jan 17, 2024 · 2 min read · linux bash  ·
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    About Special Parameters

    • Special parameters are set by the shell to store information about aspects of its current state
    • Example 1: the number of arguments of the current script
    • Example 2: the exit code of the last command.
    • Their names are nonalphanumeric characters (for example, *, #, and _). Variables are identified …


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  • Parameters and Variables

    calendar Jan 17, 2024 · 2 min read · linux bash  ·
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    About Parameters in bash

    • A parameter is an entity that stores values.
    • There are three types of parameters:
      • positional parameters
      • special parameters
      • variables
    • We'll discuss here only positional parameters.
      (the other types will be discussed in other posts)

    Positional Parameters

    • These are arguments present you give …


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  • bash Hello World program

    calendar Jan 17, 2024 · 2 min read · linux bash  ·
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    Shell Script

    • A shell script is a file containing one or more commands
    • You could type those commands individually on the command line
    • Here's the content of my first shell script:
    1echo Hello World!
    • We have already encountered the [echo] command in

      Command Types

    • Now I have to give my file a name:
      • do not choose …


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  • Bash Introduction

    calendar Jan 17, 2024 · 2 min read · linux bash  ·
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    UNIX philosophy

    Every operating system needs to interract with users.
    The original UNIX philosophy said (among other things):
    Write programs that do one thing and do it well. Write programs to work together.
    This philosophy applis also to the interraction with the user, and the kernel.
    In other words, the UNIX system …


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