☑️Day 16: Practicing Shell Scripting and User Management in Red Hat🚀

🔹Table Of content :

• ✅Introduction

• ✅Writing Shell Scripts in Red Hat

• ✅Adding New Users in RHEL via Script

• ✅Editing Files Using Vim

• ✅Basic Linux Commands for User Management & Permissions

  • whoami

  • chmod

  • ls -l

  • passwd

  • exit

• ✅User Input for User Creation

• ✅Key Takeaways from Day 16

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Hey everyone! 👋

Today was Day 16 of my DevOps journey, and I focused on practicing shell scripts and diving deeper into user management in Red Hat Enterprise Linux (RHEL). It was a hands-on day where I learned to add users, manage files, and work with essential Linux commands. Here's a breakdown of what I covered:

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🛠️ 1. Writing Shell Scripts in Red Hat

I started the day by practicing basic shell scripting. Writing scripts in Linux allows for powerful automation, making repetitive tasks much easier. I worked on a script that would add new users with a prompt for user input, which brings me to the next skill I honed today.

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👤 2. Adding New Users in RHEL via Script

User management is a core task in system administration. I created a script that automates the process of adding users by accepting user input. Here’s a basic example of how it works:

#!/bin/bash
echo "Enter the username:"
read username
sudo useradd $username
echo "User $username has been added successfully!"

This simple script helps to automate adding users without manually typing commands for each one.

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📝 3. Editing Files Using Vim

Working with Vim was another big part of today’s learning. It’s a powerful text editor, and mastering it is essential for editing configuration files or scripts. I practiced:

• Editing files: Opening a file using vim filename.

• Inserting text: Pressing i to enter insert mode.

• Saving changes: Using :w to write the changes.

• Exiting Vim: Using :q to quit, or :wq to save and quit.

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🔒 4. Basic Linux Commands for User Management & Permissions

In addition to scripting and file editing, I practiced essential Linux commands related to user management and file permissions:

• whoami: Displays the current logged-in user.

whoami

• chmod: Changes file permissions.

chmod 755 filename

This command is crucial for ensuring that files and directories have the correct permissions for different users.

• ls -l: Lists files with detailed information, including permissions.

ls -l

• passwd: Changes a user’s password. As an admin, this is an important command to ensure user security.

passwd username

• exit: Exits the current shell session.

exit

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🔑 5. User Input for User Creation

In addition to scripting, I explored how to get user input for creating accounts. This allows for more interactive and dynamic scripts, which is incredibly helpful when working in real-world environments.

#!/bin/bash
echo "Enter the username:"
read username
sudo useradd $username
echo "Set password for $username:"
sudo passwd $username
echo "User $username has been added and password set!"

This script not only adds a new user but also prompts the admin to set the password, making it a streamlined process.

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💡 Key Takeaways from Day 16:

• Shell scripting is essential for automating user management tasks in Red Hat.

• Vim is a powerful tool for editing scripts and system files.

• Commands like whoami, chmod, ls -l, and passwd are essential in everyday Linux operations.

• Combining scripting with user input adds flexibility to your scripts, making them more practical for real-world use.

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I’m feeling more confident every day as I continue to practice these essential skills in RHEL. These tasks are fundamental for any Linux system administrator, and I can already see how valuable they’ll be in my future projects. 🚀

Stay tuned as I continue to dive deeper into DevOps and Red Hat in the coming days!

Happy Learning!😊

#90DaysOfDevOps

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