Linux distributions overview (Ubuntu, CentOS, Fedora) in Linux CLI - Mini Project: Build & Apply

Linux distributions overview (Ubuntu, CentOS, Fedora)

📖 Scenario: You are learning about popular Linux distributions used in servers and desktops. Each distribution has its own package manager and commands to check system info.This project will help you practice basic Linux commands to identify and compare Ubuntu, CentOS, and Fedora systems.

🎯 Goal: Build a simple script that stores Linux distribution names and their package managers, then prints out the info clearly.

📋 What You'll Learn

Create a dictionary with Linux distributions and their package managers

Add a variable to hold a message prefix

Use a for loop to print each distribution and its package manager

Print the final output lines exactly as specified

💡 Why This Matters

🌍 Real World

System administrators often need to know which Linux distribution is running and which package manager to use for installing software.

💼 Career

Understanding Linux distributions and their package managers is essential for roles in IT support, DevOps, and system administration.

1

Create the Linux distributions dictionary

Create a dictionary called distros with these exact entries: 'Ubuntu': 'apt', 'CentOS': 'yum', 'Fedora': 'dnf'.

Linux CLI

# Create the dictionary called distros with the given entries
# Your code here

Hint

Use curly braces {} to create a dictionary with keys and values separated by colons.

2

Add a message prefix variable

Add a variable called message and set it to the string 'The package manager for'.

Linux CLI

distros = {'Ubuntu': 'apt', 'CentOS': 'yum', 'Fedora': 'dnf'}
# Add the message variable below
# Your code here

Hint

Assign the exact string to the variable message.

3

Loop through the dictionary to prepare output

Use a for loop with variables distro and pkg_mgr to iterate over distros.items(). Inside the loop, create a variable line that combines message, distro, and pkg_mgr in this format: ' is '.

Linux CLI

distros = {'Ubuntu': 'apt', 'CentOS': 'yum', 'Fedora': 'dnf'}
message = 'The package manager for'
# Use a for loop to create the line variable inside
# Your code here

Hint

Use an f-string to combine variables into the desired sentence.

4

Print the output lines

Inside the same for loop, add a print(line) statement to display each line.

Linux CLI

distros = {'Ubuntu': 'apt', 'CentOS': 'yum', 'Fedora': 'dnf'}
message = 'The package manager for'
for distro, pkg_mgr in distros.items():
    line = f'{message} {distro} is {pkg_mgr}'
    # Print the line below
    # Your code here

Hint

Use print(line) inside the loop to show each message.

Practice

1. Which Linux distribution is known for being beginner-friendly and suitable for general use?

easy

A. Ubuntu

B. CentOS

C. Fedora

D. Arch Linux

Solution

1. Step 1: Understand beginner-friendly distributions

   Ubuntu is widely recognized for its ease of use and beginner-friendly interface.

2. Step 2: Compare with other distributions

   CentOS is more server-focused and Fedora targets advanced users, so they are less beginner-friendly.

3. Final Answer:

   Ubuntu -> Option A

4. Quick Check:

   Beginner-friendly = Ubuntu [OK]

Hint: Ubuntu = beginner-friendly, CentOS = servers, Fedora = advanced [OK]

Common Mistakes:

• Confusing CentOS as beginner-friendly
• Thinking Fedora is for beginners
• Choosing Arch Linux which is advanced

2. Which command correctly installs a package on CentOS using the default package manager?

easy

A. apt-get install httpd

B. pacman -S httpd

C. dnf install httpd

D. yum install httpd

Solution

1. Step 1: Identify CentOS package manager

   CentOS traditionally uses yum as its package manager.

2. Step 2: Check command syntax

   yum install httpd is the correct syntax to install the Apache web server on CentOS.

3. Final Answer:

   yum install httpd -> Option D

4. Quick Check:

   CentOS uses yum = yum install [OK]

Hint: CentOS uses yum, Ubuntu uses apt, Fedora uses dnf [OK]

Common Mistakes:

• Using apt-get on CentOS
• Using pacman which is for Arch Linux
• Confusing dnf as default on CentOS

3. What will be the output of the command cat /etc/os-release | grep '^ID=' on a Fedora system?

medium

A. ID=fedora

B. ID=centos

C. ID=ubuntu

D. ID=debian

Solution

1. Step 1: Understand /etc/os-release file

   This file contains identification info about the Linux distribution, including the ID field.

2. Step 2: Recognize Fedora's ID value

   Fedora's ID in this file is fedora, so the grep command outputs ID=fedora.

3. Final Answer:

   ID=fedora -> Option A

4. Quick Check:

   Fedora ID = fedora [OK]

Hint: Fedora's ID in os-release is 'fedora' [OK]

Common Mistakes:

• Assuming ID=ubuntu on Fedora
• Confusing CentOS and Fedora IDs
• Not using grep correctly

4. You try to update packages on Fedora using yum update but get an error. What is the likely cause?

medium

A. CentOS commands work on Fedora without changes

B. You need to run 'apt-get update' instead

C. Fedora uses 'dnf' instead of 'yum' for package management

D. You must use 'pacman' on Fedora

Solution

1. Step 1: Identify Fedora's package manager

   Fedora uses dnf as its default package manager, replacing yum.

2. Step 2: Understand error cause

   Using yum update on Fedora may fail because yum is deprecated or not installed by default.

3. Final Answer:

   Fedora uses 'dnf' instead of 'yum' for package management -> Option C

4. Quick Check:

   Fedora package manager = dnf [OK]

Hint: Fedora uses dnf, not yum, for updates [OK]

Common Mistakes:

• Trying apt-get on Fedora
• Assuming CentOS commands always work
• Using pacman which is Arch Linux's manager

5. You want to set up a stable web server environment with long-term support and minimal updates. Which Linux distribution should you choose?

hard

A. Ubuntu

B. CentOS

C. Fedora

D. Debian Testing

Solution

1. Step 1: Understand stability and support needs

   Stable web servers require long-term support and minimal frequent updates to avoid disruptions.

2. Step 2: Match distribution to requirements

   CentOS is known for its stability and long-term support, making it ideal for servers.

3. Step 3: Compare other options

   Fedora is cutting-edge and updates often; Ubuntu is user-friendly but less stable long-term; Debian Testing is unstable.

4. Final Answer:

   CentOS -> Option B

5. Quick Check:

   Stable server = CentOS [OK]

Hint: Choose CentOS for stable, long-term server setups [OK]

Common Mistakes:

• Choosing Fedora for stability
• Assuming Ubuntu is best for servers
• Picking Debian Testing for production