Bash Shell Scripting Quick-Start on Elementary OS Linux

The Linux Tutorial Shows You Step-by-Step How-to Getting-Started Making and Executing a Bash Shell Script for Elementary OS 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.

Open a Terminal Shell emulator window
Ctrl+Alt+t on desktop
(Press “Enter” to Execute Commands)
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 a Bash Shell Script :)'
```
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
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 a Bash Shell Script :)
```