GX2 Finding Your Way on a Linux System

Question 1

Topic 2.1: Command Line Basics

What is Bash?

Answer 1

Bash (Bourne Again Shell) is a command-line interpreter that allows users to interact with the Linux operating system.

Question 2

Topic 2.1: Command Line Basics

What does the echo command do?

Answer 2

The echo command prints text or variables to the terminal. Example: echo “Hello, Linux!”

Question 3

Topic 2.1: Command Line Basics

How can you view previously entered commands in the terminal?

Answer 3

Use the history command to display a list of previously executed commands.

Question 4

Topic 2.1: Command Line Basics

What is the purpose of the PATH environment variable?

Answer 4

The PATH variable defines directories where the system looks for executable programs.

Question 5

Topic 2.1: Command Line Basics

How do you set or modify an environment variable?

Answer 5

Use the export command. Example: export MYVAR=”Hello”

Question 6

Topic 2.1: Command Line Basics

How do you check the type of a command or utility?

Answer 6

Use the type command. Example: type ls tells you if ls is a built-in or external command.

Question 7

Topic 2.2: Using the Command Line to Get Help

How do you access the manual (man) page for a command?

Answer 7

Use the man command followed by the command name. Example: man ls

Question 8

Topic 2.2: Using the Command Line to Get Help

What is the difference between man and info pages?

Answer 8

man pages provide concise documentation, while info pages offer more detailed, structured documentation.

Question 9

Topic 2.2: Using the Command Line to Get Help

Where can you find additional documentation on installed programs?

Answer 9

In the /usr/share/doc/ directory.

Question 10

Topic 2.2: Using the Command Line to Get Help

How do you locate a file or command on the system?

Answer 10

Use the locate command. Example: locate bashrc

Question 11

Topic 2.3: Using Directories and Listing Files

How do you list files in a directory?

Answer 11

Use the ls command. Example: ls -l for a detailed list.

Question 12

Topic 2.3: Using Directories and Listing Files

How do you show hidden files in a directory?

Answer 12

Use ls -a. Hidden files start with a dot (.).

Question 13

Topic 2.3: Using Directories and Listing Files

What is the difference between absolute and relative paths?

Answer 13

Absolute path: Full path from root (e.g., /home/user/file.txt).

Relative path: Path from the current directory (e.g., ../file.txt).

Question 14

Topic 2.3: Using Directories and Listing Files

What do . and .. represent in a directory?

Answer 14

. represents the current directory.

.. represents the parent directory.

Question 15

Topic 2.3: Using Directories and Listing Files

What does cd ~ do?

Answer 15

It navigates to the home directory of the current user.

Question 16

Topic 2.4: Creating, Moving, and Deleting Files

How do you create an empty file?

Answer 16

Use the touch command. Example: touch myfile.txt

Question 17

Topic 2.4: Creating, Moving, and Deleting Files

How do you move or rename a file?

Answer 17

Use the mv command. Example: mv oldname.txt newname.txt

Question 18

Topic 2.4: Creating, Moving, and Deleting Files

How do you copy a file?

Answer 18

Use the cp command. Example: cp file.txt backup.txt

Question 19

Topic 2.4: Creating, Moving, and Deleting Files

How do you delete a file?

Answer 19

Use the rm command. Example: rm myfile.txt

Question 20

Topic 2.4: Creating, Moving, and Deleting Files

How do you create and remove directories?

Answer 20

Create: mkdir mydir

Remove: rmdir mydir (only works if empty)