How can I troubleshoot and solve the issue related to logging into an EC2 using SSH?

 In the context of AWS, Here is a step-by-step method or approach given of how you can troubleshoot and resolve this particular issue:-

Checking security group rules

You can try to ensure that the security group is associated with the EC2 Instance which would allow inbound SSH traffic on port 22 from your particular IP address.

Verify the key pair

Try to confirm that the SSH key pair used in launching the EC2 Instance is correct and that you have the private key (.pem) file saved securely on your local machine. If you need, you can create a new key pair in the AWS management.

Instance status

You can check the status of the EC2 Instance to ensure that it is running and reachable. You can use the AWS management console or even AWS CLI to view the Instance state and system logs.

Network accessibility

You can try to ensure that your local network firewall setting Should not block outgoing SSH connection to the EC2 Instance. You can test the connectivity by using tools like “telnet” to check if port 22 is reachable.

Instance user and SSH command

You can double-check the username that you are using to SSH into the Instance. You should use the correct username in your particular SSH command along with the private key file.

#!/bin/bash

# Step 1: Check Security Group Rules

Aws ec2 authorize-security-group-ingress –group-id --protocol tcp –port 22 –cidr /32

# Step 2: Verify Key Pair

Aws ec2 create-key-pair –key-name --query ‘KeyMaterial’ –output text > .pem

# Step 3: Describe Instance Status

Aws ec2 describe-instance-status –instance-ids

# Step 4: Test Network Accessibility

Nc -vz 22# Step 5: SSH into the Instance

Ssh -I @