Connecting to EC2 instance (Ubuntu 22.04) with SSH password auth

Notable: Connecting to an EC2 instance using SSH with password authentication - Ubuntu 22.04

Abstract: A user named demo117 was created on an Ubuntu 22.04 EC2 instance along with its password using the 'useradd' and 'passwd' commands respectively. This article explains the process of connecting to the instance using SSH with password authentication.

Created: 2024-05-30 by UserComp.com Editors

Notable: Connecting EC2 Instance using SSH Password Authentication with Ubuntu 22.04

In this article, we will discuss how to connect to an EC2 instance using SSH password authentication with Ubuntu 22.04. We will cover the key concepts and provide detailed instructions on how to set up and configure password authentication for your EC2 instance.

Prerequisites

Before we begin, you will need to have an EC2 instance running Ubuntu 22.04. You will also need to have created a user on the instance using the useradd command and set a password for the user using the passwd command.

Enabling Password Authentication

By default, password authentication is disabled on Ubuntu 22.04. To enable it, you will need to edit the SSH daemon configuration file.

Step 1: Connect to the EC2 instance using SSH

Use the following command to connect to the EC2 instance using SSH:

ssh -i /path/to/your/key.pem ubuntu@your-ec2-ip-address

Step 2: Edit the SSH daemon configuration file

Once you are connected to the EC2 instance, use a text editor such as nano or vi to edit the SSH daemon configuration file:

sudo nano /etc/ssh/sshd_config

Step 3: Change the PasswordAuthentication option

Find the line that says PasswordAuthentication no and change it to PasswordAuthentication yes.

Step 4: Restart the SSH daemon

After you have made the change, save and close the file. Then, restart the SSH daemon to apply the changes:

sudo systemctl restart ssh

Connecting to the EC2 Instance using Password Authentication

Now that you have enabled password authentication, you can connect to the EC2 instance using the ssh command and the user's password:

ssh -o PreferredAuthentications=password ubuntu@your-ec2-ip-address

In this article, we discussed how to connect to an EC2 instance using SSH password authentication with Ubuntu 22.04. We covered the key concepts and provided detailed instructions on how to set up and configure password authentication for your EC2 instance.

References

Ubuntu 22.04 SSH daemon configuration: https://help.ubuntu.com/lts/serverguide/ssh.html.en
Amazon EC2 documentation: https://docs.aws.amazon.com/ec2/

Tags: Linux EC2 SSH Password Authentication

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