Tutorial12: Shell Scripting - Part 2

ADDITIONAL SHELL SCRIPTING

Main Objectives of this Practice Tutorial

• Learn about additional logic control-flow statements if-else and if-elif-else

• Learn additional uses of the for loop control-flow statement.

• Learn the purpose of command substitution and how it can be used with control-flow statements

• List and explain the purpose of several start-up files

Tutorial Reference Material

Course Notes		Linux Command/Shortcut Reference		YouTube Videos
Course Notes: PDF | PPTX		Additional Control Flow Statements if-else if-elif-else for Loop while Loop	Startup Files Purpose Examples	Brauer Instructional Videos:

KEY CONCEPTS

Additional Logic Statements

File:If=else.png

Examples of using Environment and User Defined variables.

if-else Statements

If the test condition returns a TRUE value, then the Linux Commands between then and else statements are executed.
If the test returns a FALSE value, then the the Linux Commands between the else and fi statements are executed.

Example:

num1=5
num2=10
if test $num1 –lt $num2
then
   echo “Less Than”
else
echo    “Greater Than or Equal to”
fi

Additional Loop Statements

x

Using Startup Files

x

INVESTIGATION 1: ADDITIONAL LOGIC STATEMENTS

In this section, you will learn how to ...

Perform the Following Steps:

1. x
   
   

In the next investigation, you will ...

INVESTIGATION 2: ADDITIONAL LOOPING STATEMENTS

In this section, you will learn how to ...

Perform the Following Steps:

1. x
   
   

In the next investigation, you will ...

INVESTIGATION 3: USING STARTUP FILES

In this section, you will learn how to ...

Perform the Following Steps:

1. x
   

LINUX PRACTICE QUESTIONS

The purpose of this section is to obtain extra practice to help with quizzes, your midterm, and your final exam.

Here is a link to the MS Word Document of ALL of the questions displayed below but with extra room to answer on the document to simulate a quiz:

https://ict.senecacollege.ca/~murray.saul/uli101/uli101_week12_practice.docx

Your instructor may take-up these questions during class. It is up to the student to attend classes in order to obtain the answers to the following questions. Your instructor will NOT provide these answers in any other form (eg. e-mail, etc).

Review Questions:

1. x
2. x
3. x
4. x
5. x
6. x
7. x
8. x