Why user management secures systems in Linux CLI - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the command to list all users on a Linux system.

Linux CLI

cat /etc/[1]

Drag options to blanks, or click blank then click option'

Ahosts

Bpasswd

Cshadow

Dgroup

Attempts:

3 left

💡 Hint

Common Mistakes

Using /etc/hosts instead of /etc/passwd

Using /etc/shadow which is for passwords only

The /etc/passwd file contains user account information, so listing it shows all users.

2fill in blank

medium

Complete the command to add a new user named 'alice'.

Linux CLI

sudo [1] alice

Drag options to blanks, or click blank then click option'

Auserdel

Bpasswd

Cgroupadd

Duseradd

Attempts:

3 left

💡 Hint

Common Mistakes

Using userdel which deletes users

Using passwd which changes passwords

The useradd command creates a new user account.

3fill in blank

hard

Fix the error in the command to change user 'bob' password.

Linux CLI

sudo [1] bob

Drag options to blanks, or click blank then click option'

Apasswd

Buseradd

Cusermod

Dgroupmod

Attempts:

3 left

💡 Hint

Common Mistakes

Using useradd which adds users

Using usermod which modifies user properties but not passwords

The passwd command is used to change a user's password.

4fill in blank

hard

Fill both blanks to create a user 'charlie' with a home directory and default shell /bin/bash.

Linux CLI

sudo [1] -m -s [2] charlie

Drag options to blanks, or click blank then click option'

Auseradd

B/bin/sh

C/bin/bash

Dusermod

Attempts:

3 left

💡 Hint

Common Mistakes

Using usermod instead of useradd

Setting shell to /bin/sh instead of /bin/bash

useradd creates the user, -m makes a home directory, and -s /bin/bash sets the shell.

5fill in blank

hard

Fill all three blanks to list all users with UID greater than 1000 from /etc/passwd.

Linux CLI

awk -F: '{{ if ($3 [1] [2]) print $1 }}' /etc/[3]

Drag options to blanks, or click blank then click option'

A<

B1000

Cpasswd

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>'

Using /etc/shadow instead of /etc/passwd

This command uses awk to print usernames where UID (field 3) is greater than 1000 from /etc/passwd.