Mac OS X Shell Scripting QuickStart
The Tutorial Shows You Step-by-Step How-to Getting-Started Making and Running a Bash Shell Script for Mac OS X 10.11 El Capitan BSD.
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 some BSD/Unix system.
To Edit & Save our Bash Shell Script we’ll make Use of the Default Mac Shell Editor nano.
Open a Shell Terminal emulator window
(Press “Enter” to Execute Commands)
Editing a Bash Script on Home Directory with nano
First we Change to our Home with1cd ~
Then we Make the Bash Script with1nano mybashscript.sh
To be Runnable directly as a Shell Script we append a Bash Shebang to the Top like1#!/bin/bash
Then for Testing the Execution we should Insert a classic Hello-Word greating1echo 'Hello World!'
The ‘echo‘ Command simply Output a String on Terminal
So finally our simple Bash Script will be containing just1234#!/bin/bashdateecho 'Hello World!'echo 'From a Bash Shell Script :)'
The Sequence of Bash Commands must be a Stack of sigle Commands123myBashCommand1myBashCommand2...
Or simply in a Line of Commands Divided by a ‘;’ SemiColon1myBashCommand1 ; myBashCommand2 ...
Ctrl+x to Save & Exit from nano Editor
Executing the Hello-World Bash Script
We Need to give the Execution Permissions with1chmod +x ./mybashscript.sh
Then to Run our little Bash Script simply
You’ll be nicely greeted on Shell with something like
123Sun Jan 10 10:31:26 PST 2016Hello World!From a Bash Shell Script :)