Bash Shell Scripting- simple if and if-else conditional statement

This video tutorial covers the use of conditional statements in shell scripting, focusing on simple if and if-else statements. It explains how to replace command chaining with conditional logic, demonstrates practical implementation in shell scripts, and explores advanced logic using exit status. The tutorial also discusses the syntax and best practices for writing conditional statements, including indentation and nullifying command outputs.

What is the primary purpose of using conditional statements in shell scripting?

• To define variables

• To manage file permissions

• To create loops in scripts

• To execute commands based on certain conditions

In a simple if statement, what happens if the condition is not met?

• The script restarts

• An error message is displayed

• The commands inside the if block are skipped

• The script stops executing

Why is indentation considered a best practice in shell scripting?

• It speeds up script execution

• It prevents syntax errors

• It is required by the shell

• It helps in organizing and reading the code

What is the purpose of nullifying command outputs in shell scripting?

• To hide error messages

• To prevent unnecessary output from cluttering the terminal

• To increase script execution speed

• To save disk space

How can you check the success of a command using its exit status?

• By checking if the exit status is 1

• By checking if the exit status is 0

• By checking if the exit status is -1

• By checking if the exit status is 2

What is the main difference between if and if-else statements?

• If statements are faster

• If-else statements are only used for error handling

• If-else statements can handle both success and failure scenarios

• If statements can only execute one command

In an if-else statement, what happens if the condition is false?

• The script stops executing

• The commands in the else block are executed

• An error message is displayed

• The script restarts

What is the purpose of using the 'else' block in an if-else statement?

• To execute commands when the if condition is true

• To execute commands when the if condition is false

• To repeat the if condition

• To terminate the script

In the Apache installation example, what does the script do if Apache is not installed?

• It executes a different block of code

• It restarts the system

• It installs Apache

• It displays an error message

What command is used to install Apache in the given example?

• sudo yum install apache2

• sudo apt-get install apache2

• sudo pacman -S apache2

• sudo install apache2