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Creating Simple Shell Scripts
Shell scripts are an important tool in a system administrator’s toolbox. Whether you use them for automation, reporting, or just ad-hoc to process large volumes of repetitive work, it’s important to have an understanding of how to make scripts work for you. In this hands-on lab, we will take a look at shell scripts, including basic concepts. **Red Hat Exam Requirements Covered:** - Conditionally executing code (use of: if, test, [], etc.) - Using looping constructs (for, etc.) to process file command-line input - Processing script inputs ($1, $2, etc.) - Processing output of shell commands within a script - Processing shell command exit codes *This course is not approved or sponsored by Red Hat.*
Path Info
Table of Contents
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Challenge
Create a Script to Add Users in Batches of 1 or More at a Time
- Add a user by hand — and realize how much work it is!
- Create a script that will add users in a batch from an input file.
- Test if the script works and if the desired results occur.
- Add another key step to the user creation process to save more time.
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Challenge
Create a User Deletion Script
- Realize you'll be deleting batches of users too!
- Copy the
create_users.shscript, and make the changes. - Delete the recently added users.
What's a lab?
Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.
Provided environment for hands-on practice
We will provide the credentials and environment necessary for you to practice right within your browser.
Guided walkthrough
Follow along with the author’s guided walkthrough and build something new in your provided environment!
Did you know?
On average, you retain 75% more of your learning if you get time for practice.