Bash Shell Scripting QuickStart on Ubuntu 15.10 Wily Linux

January 9th, 2016 by thelinuxevangelist

Linux Ubuntu Shell Scripting QuickStart




The Linux Tutorial Shows You Step-by-Step How-to Getting-Started Making and Running a Bash Shell Script for Ubuntu 15.10 Wily GNU/Linux.

Shell Scripts are files in which we write a Sequence of Commands that we need to perform and are Executed using the Shell utility.

The Bash (Bourne Again Shell) is the Default Shell environment for most GNU/Linux system.

To Edit & Save our Bash Shell Script we’ll make Use of the Default GNU/Linux Shell Editor nano.

How-to QuickStart with Bash Shell Scripting on Ubuntu Linux - Featured
  1. Open a Shell session
    Ctr+Alt+t to open a Terminal emulator on Desktop
    (Press “Enter” to Execute Commands)

    How-to QuickStart with Bash Shell Scripting on Ubuntu Linux - Open Terminal
  2. Editing a Bash Script on Home Directory with nano
    First we Change to our Home with

    cd ~

    Then we Make the Bash Script with

    nano mybashscript.sh

    To be Runnable directly as a Shell Script we append a Bash Shebang to the Top like

    #!/bin/bash

    Then for Testing the Execution we should Insert a classic Hello-Word greating

    echo 'Hello World!'

    The ‘echo‘ Command simply Output a String on Terminal
    So finally our simple Bash Script will be containing just

    #!/bin/bash
    date
    echo 'Hello World!'
    echo 'From the Bash Shell'
    

    The Sequence of Bash Commands must be a Stack of sigle Commands

    myBashCommand1
    myBashCommand2
    ...
    

    Or simply in a Line of Commands Divided by a ‘;’ SemiColon

    myBashCommand1 ; myBashCommand2 ...

    Ctrl+x to Save & Exit from nano Editor

  3. Executing the Hello-World Bash Script
    We Need to give the Execution Permissions with

    chmod +x ./mybashscript.sh

    Then to Run our little Bash Script simply

    ./mybashscript.sh

    You’ll be nicely greeted on Shell with something like

    Sun Jan 10 10:31:26 PST 2016
    Hello World!
    From the Bash Shell
    
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