Why user management secures systems in Linux CLI - See It in Action

Why User Management Secures Systems

📖 Scenario: You are a system administrator responsible for securing a Linux server. Proper user management helps protect the system by controlling who can access it and what they can do.

🎯 Goal: Learn how to list users, set a limit on user IDs, and display users with IDs above that limit to understand how user management helps secure systems.

📋 What You'll Learn

Create a list of users with their user IDs

Set a user ID threshold to separate system users from regular users

Filter users with user IDs above the threshold

Display the filtered list of users

💡 Why This Matters

🌍 Real World

System administrators use user management to control who can access a system and what they can do, protecting the system from unauthorized access.

💼 Career

Understanding user management is essential for roles like system administrator, security analyst, and IT support to maintain secure and well-managed systems.

1

Create a list of users with their user IDs

Create a variable called users that contains these exact entries as tuples: ('root', 0), ('daemon', 1), ('alice', 1001), ('bob', 1002), ('carol', 1003).

Linux CLI

# Create the list of users with their user IDs
# Your code here

Need a hint?

Use a list of tuples where each tuple has a username and a user ID number.

2

Set a user ID threshold to separate system users from regular users

Create a variable called uid_threshold and set it to 1000.

Linux CLI

users = [('root', 0), ('daemon', 1), ('alice', 1001), ('bob', 1002), ('carol', 1003)]
# Set the user ID threshold
# Your code here

Need a hint?

This threshold helps separate system users (below 1000) from regular users (1000 and above).

3

Filter users with user IDs above the threshold

Create a list called regular_users that contains only the usernames from users where the user ID is greater than uid_threshold. Use a list comprehension.

Linux CLI

users = [('root', 0), ('daemon', 1), ('alice', 1001), ('bob', 1002), ('carol', 1003)]
uid_threshold = 1000
# Filter regular users with user IDs above the threshold
# Your code here

Need a hint?

Use a list comprehension to pick usernames where the user ID is greater than the threshold.

4

Display the filtered list of regular users

Write a print statement to display the regular_users list exactly as it is.

Linux CLI

users = [('root', 0), ('daemon', 1), ('alice', 1001), ('bob', 1002), ('carol', 1003)]
uid_threshold = 1000
regular_users = [name for name, uid in users if uid > uid_threshold]
# Print the list of regular users
# Your code here

Need a hint?

Use print(regular_users) to show the list.