Bash Shell Scripting- How to handle the command line arguments

The video tutorial explains how to create and enhance a shell script to manage services using systemctl. It covers input methods, including read commands and command line arguments, and demonstrates how to handle these inputs effectively. The tutorial also emphasizes the importance of error handling and providing usage instructions for scripts.

What are the two ways to provide input to a shell script?

• Using echo command and command line arguments

• Using read command and command line arguments

• Using print command and environment variables

• Using input command and file input

What command is used to check the status of a service like nginx?

• systemctl status nginx

• systemctl check nginx

• service check nginx

• service status nginx

In the shell script, where is the user input for the service name stored?

• In a function

• In a file

• In a constant

• In a variable

What additional actions can the enhanced shell script perform on services?

• Install and uninstall

• Enable and disable

• Start, stop, and restart

• Backup and restore

Why is it important to have root privileges for certain actions in the shell script?

• To increase script execution speed

• To perform actions like start and stop

• To execute commands without errors

• To access system files

How can command line arguments be used in the shell script?

• By using environment variables

• By storing them in a file

• By passing them directly when running the script

• By using the read command

What does the dollar hash ($#) symbol represent in a shell script?

• The current directory

• The number of command line arguments

• The last executed command

• The script name

What should be done if the required number of command line arguments is not provided?

• Ignore the missing arguments

• Provide a default value

• Continue with a warning

• Display a usage message and exit

What is the purpose of using an exit code in a shell script?

• To indicate successful completion

• To restart the script

• To provide feedback to the user

• To signal an error or specific condition

What information should be included in the usage instructions of a shell script?

• The script's author and version

• The required command line arguments and valid actions

• The script's execution time

• The system requirements