Connecting to EC2 instances in AWS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the key pair file when connecting to an EC2 instance using SSH.

AWS

ssh -i [1] [e-mail]

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

Amy-key.key

Bmy-key.txt

Cmy-key.pub

Dmy-key.pem

Attempts:

3 left

💡 Hint

Common Mistakes

Using the public key file (.pub) instead of the private key (.pem)

Using a text file or wrong extension for the key

The -i option specifies the private key file with a .pem extension used for SSH authentication.

2fill in blank

medium

Complete the command to connect to an EC2 instance with the correct username for Amazon Linux.

AWS

ssh -i my-key.pem [1]@ec2-198-51-100-1.compute-1.amazonaws.com

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

Aec2-user

Bubuntu

Cadmin

Droot

Attempts:

3 left

💡 Hint

Common Mistakes

Using root which is disabled by default

Using ubuntu for Amazon Linux instances

Amazon Linux EC2 instances use ec2-user as the default SSH username.

3fill in blank

hard

Fix the error in the SSH command to connect to an EC2 instance by selecting the correct option for the port number.

AWS

ssh -i my-key.pem -p [1] [e-mail]

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

A22

B8080

C443

D3306

Attempts:

3 left

💡 Hint

Common Mistakes

Using HTTP or database ports instead of SSH port

Omitting the port option when a non-standard port is required

SSH uses port 22 by default. Using the correct port ensures the connection succeeds.

4fill in blank

hard

Fill both blanks to create a security group rule allowing SSH access from anywhere.

AWS

aws ec2 authorize-security-group-ingress --group-id sg-123abc --protocol [1] --port [2] --cidr 0.0.0.0/0

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

Atcp

Budp

C22

D80

Attempts:

3 left

💡 Hint

Common Mistakes

Using UDP instead of TCP

Opening port 80 which is for HTTP, not SSH

SSH uses the TCP protocol on port 22. This command opens port 22 for SSH access.

5fill in blank

hard

Fill all three blanks to create an SSH command that connects to an EC2 instance with a specific key, user, and IP address.

AWS

ssh -i [1] [2]@[3]

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

Amy-ec2-key.pem

Bec2-user

C54.201.123.45

Dubuntu

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong username like ubuntu for Amazon Linux

Using a domain name instead of the IP address

The command uses the private key file my-ec2-key.pem, the default user ec2-user, and the instance's public IP address 54.201.123.45.