hands-on lab

Working with While Loops in Your Shell Scripts

Up to 45m
Get guided in a real environmentPractice with a step-by-step scenario in a real, provisioned environment.
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Lab description

In this lab, you will utilize while loops in two Linux shell scripts. The commands used in this lab have been covered in the While Loops course. References to the specific lessons of the course will be provided throughout the lab steps.

The expected outputs for each lab step are provided as comments in the lab script file.

Learning Objectives

Upon completion of this lab, you will be able to:

  • Read each line of a file using a while loop
  • Run commands a specified number of times using a while loop

Intended Audience

  • Those beginning to work with Linux
  • Those looking to gain experience with basic shell scripting
  • Software Engineers
  • DevOps Engineers


You should be familiar with the following scripting features before attempting this lab:

  • While Loops
  • Grep
  • Shell Variables
  • Vim, Nano, or Emacs

Refer to the following courses to fulfill the prerequisite:

Environment before

Environment after

About the author
Jun Fritz, opens in a new tab
Cloud Labs Developer
Learning paths

Jun is a Cloud Labs Developer with previous experience as a Software Engineer and Cloud Developer. He holds the AWS Certified Solutions Architect and DevOps Engineer Professional certifications. He also holds the AWS Certified Solutions Architect, Developer, and SysOps Administrator Associate certifications. 

Jun is focused on giving back to the growing cloud community by sharing his knowledge and experience with students and creating engaging content. 

Covered topics
Lab steps
Accessing the Amazon Linux 2 Terminal
Modifying Your Lab Shell Script
Reading Files with a While Loop
Looping Through a Given Index