Opening and using the terminal in Linux CLI - Mini Project: Build & Apply

Opening and Using the Terminal

📖 Scenario: You want to learn how to open the terminal on your Linux computer and run simple commands to see how it works.

🎯 Goal: Learn to open the terminal, check your current folder, and list files inside it.

📋 What You'll Learn

Open the terminal application

Use the pwd command to show the current folder

Use the ls command to list files in the current folder

💡 Why This Matters

🌍 Real World

Opening and using the terminal is the first step to controlling your computer with commands. It helps you manage files, run programs, and automate tasks.

💼 Career

Many jobs in IT, programming, and system administration require using the terminal to work efficiently and solve problems.

1

Open the Terminal

Open the terminal application on your Linux computer. You do not need to type anything yet.

Linux CLI

# Open the terminal application

Hint

Look for an app called 'Terminal' or press Ctrl + Alt + T to open it.

2

Show Current Folder

Type the command pwd and press Enter to show your current folder path.

Linux CLI

# Type pwd and press Enter

Hint

The pwd command means 'print working directory'. It shows where you are in the folder system.

3

List Files in Current Folder

Type the command ls and press Enter to list all files and folders in your current folder.

Linux CLI

pwd
# Type ls and press Enter

Hint

The ls command lists files and folders in the current folder.

4

View the Output

Look at the output of the pwd and ls commands you typed. This shows your current folder path and the files inside it.

Linux CLI

pwd
ls
# Observe the output

Hint

The output should show a folder path like /home/yourname and a list of files or folders.

Practice

1. What is the main purpose of opening a terminal on a Linux system?

easy

A. To type commands to control the computer

B. To watch videos

C. To browse the internet

D. To play music

Solution

1. Step 1: Understand what a terminal does

   The terminal allows users to type commands to control and manage the computer.

2. Step 2: Compare options with terminal use

   Watching videos, browsing internet, and playing music are done with other apps, not the terminal.

3. Final Answer:

   To type commands to control the computer -> Option A

4. Quick Check:

   Terminal = command control [OK]

Hint: Terminal is for commands, not media [OK]

Common Mistakes:

• Thinking terminal is for media
• Confusing terminal with GUI apps
• Not knowing terminal controls computer

2. Which of the following commands correctly opens a new terminal window in most Linux desktop environments?

easy

A. gnome-terminal

B. open-terminal

C. start-terminal

D. launch-term

Solution

1. Step 1: Identify common terminal commands

   The command gnome-terminal is the standard way to open a terminal window in GNOME desktop.

2. Step 2: Check other options

   Commands like open-terminal, start-terminal, and launch-term are not standard Linux commands.

3. Final Answer:

   gnome-terminal -> Option A

4. Quick Check:

   Standard terminal command = gnome-terminal [OK]

Hint: Remember GNOME uses gnome-terminal command [OK]

Common Mistakes:

• Typing non-existent commands
• Confusing Windows commands with Linux
• Using wrong command names

3. What will be the output of the command pwd immediately after opening a new terminal?

medium

A. /usr/bin

B. /root

C. /etc

D. /home/username

Solution

1. Step 1: Understand what pwd does

   The pwd command shows the current directory path.

2. Step 2: Know the default directory on terminal open

   When a user opens a terminal, it usually starts in their home directory, like /home/username.

3. Final Answer:

   /home/username -> Option D

4. Quick Check:

   New terminal starts in home directory [OK]

Hint: New terminal starts in your home folder [OK]

Common Mistakes:

• Assuming root or system folders
• Not knowing pwd shows current folder
• Confusing with other commands

4. You typed ls -l but got an error: ls: command not found. What is the most likely cause?

medium

A. You are not in the home directory

B. You need to use list -l instead

C. The ls command is not installed or PATH is broken

D. You forgot to open the terminal

Solution

1. Step 1: Understand the error message

   The error command not found means the system cannot find the ls command.

2. Step 2: Identify common causes

   This usually happens if the command is missing or the PATH environment variable is broken.

3. Final Answer:

   The ls command is not installed or PATH is broken -> Option C

4. Quick Check:

   Command not found = missing command or PATH issue [OK]

Hint: Command not found means missing or PATH error [OK]

Common Mistakes:

• Thinking directory location matters
• Using wrong command names
• Ignoring terminal must be open

5. You want to open a terminal and immediately list all files in your Documents folder. Which command should you use?

hard

A. open-terminal ls Documents

B. gnome-terminal -- bash -c "ls ~/Documents"

C. start-terminal -list ~/Documents

D. terminal ls -all Documents

Solution

1. Step 1: Understand how to open terminal and run a command

   The command gnome-terminal -- bash -c "ls ~/Documents" opens a terminal and runs ls ~/Documents.

2. Step 2: Check other options for correctness

   Other options use invalid commands like open-terminal, start-terminal, or wrong syntax.

3. Final Answer:

   gnome-terminal -- bash -c "ls ~/Documents" -> Option B

4. Quick Check:

   Open terminal and run command = gnome-terminal -- bash -c [OK]

Hint: Use gnome-terminal with bash -c to run commands [OK]

Common Mistakes:

• Using non-existent commands
• Wrong syntax for running commands
• Not quoting commands properly