CPR Simulator Basics of Commands in Kali

Linux Command Practice Simulator

How to use this simulator

1. Read the task.
2. Type the Linux command you think is correct.
3. Click Run Command.
4. If unsure, click Show Correct Answer.
5. You can click Help & Learn Commands to study all Linux commands used in this lab.

Task:

cpruser@ubuntu:~$

Linux Commands Learning Guide

pwd
Print Working Directory. Shows the full path of your current directory.
Example: pwd

ls
Lists files and folders in the current directory.
Example: ls

ls -la
Lists all files including hidden ones and shows detailed information like permissions and size.
Example: ls -la

ls -lh
Lists files with detailed information and displays file sizes in human-readable format (KB, MB, GB).
Example: ls -lh

mkdir
Creates a new directory.
Example: mkdir test-dir-1

mkdir test-dir-1/test-subdir-1
Creates a subdirectory inside another directory.
Example: mkdir test-dir-1/test-subdir-1

cd
Changes the current directory.
Example: cd test-dir-1

cd ..
Moves one level up to the parent directory.
Example: cd ..

cd ../..
Moves two levels up in the directory structure.
Example: cd ../..

touch
Creates an empty file.
Example: touch file1.txt

cat
Displays the contents of a file.
Example: cat file1.txt

rm
Deletes a file.
Example: rm file1.txt

which
Shows where a command program is located.
Example: which cat

file
Identifies the type of a file.
Example: file /usr/bin/cat

Linux File Management Commands

touch <filename>
Creates a new empty file in the current directory.
Example:
touch notes.txt
This creates an empty file called notes.txt.

cp <source> <destination>
Copies a file or directory from one location to another. The copied file will contain the same data as the original.
Example:
cp notes.txt backup.txt
This creates a copy of notes.txt named backup.txt.

mv <source> <destination>
Moves a file or directory to another location. It is also used to rename files.
Example (rename a file):
mv notes.txt mynotes.txt
This renames notes.txt to mynotes.txt.

rm <filename>
Deletes a file from the file system.
Example:
rm notes.txt
This removes the file notes.txt.

nano <filename>
Opens the Nano text editor to create or edit a file.
Example:
nano notes.txt
This opens the file notes.txt in the Nano editor where you can write and edit text.

cat <filename>
Displays the contents of a file in the terminal window.
Example:
cat notes.txt
This prints the contents of notes.txt on the screen.

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Exercise – Manage Files in the File System

Type the Linux command for each task.

cpruser@ubuntu:~$

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Exercise – Hidden Files

Type the Linux command to complete each task.

cpruser@ubuntu:~$

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Exercise – Finding Information in the File System

Type the Linux command for each task and test your answer.

cpruser@ubuntu:~$

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Exercise – Installing Software with APT

Type the Linux command for each task and test your answer.

cpruser@ubuntu:~$