Bash Shell Scripting Quick-Start on Ubuntu 16.04 Xenial Linux

Linux Ubuntu Shell Scripting Quick-Start

Hello Ubuntu User! This Tutorial Shows You Step-by-Step How-to Getting-Started Making and Running a Bash Shell Script for Ubuntu 16.04 Xenial Xerus LTS 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.

1. Open a Shell session
   Ctrl+Alt+t to open a Terminal emulator on Desktop
   (Press “Enter” to Execute Commands)

   

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
   

Tags: Bash, Command line, gnu, gnu linux, gnu linux tutorial, Guide, How-to, linux command line, linux shell, Linux Tutorial, quickstart, run shell script ubuntu, Shell, shell script, shell scripting, Tutorial, Ubuntu 16.04 Xenial Xerus LTS, ubuntu bash, ubuntu bash scripting, ubuntu command line, ubuntu shell, ubuntu shell scripting, ubuntu shell scripting quickstart, ubuntu tutorial