Bash Shell Scripting- For loop with arrays

The video tutorial covers the basics of using for loops in bash scripting, including variable substitution and using arrays. It demonstrates creating a shell script to monitor services like Docker and Nginx, sending email alerts if services are down, and automating the process using cron jobs.

What is the purpose of using a for loop in shell scripting?

Explain how the for loop executes when defined with an array.

What is the significance of using curly braces with variables in a for loop?

How do you define an array in a shell script for use in a for loop?

Describe the process of checking if a service is running using systemctl.

What happens if the exit status of a service check is zero?

How can you send an email alert if a service is not running?

Explain the importance of providing the complete path for commands in cron jobs.

What is the expected output when a service is not running and the script is executed?

What is the role of cron jobs in monitoring services?