ec2 ubuntu default password with code examples

Amazon Elastic Compute Cloud (EC2) is one of the most popular cloud services offered by Amazon Web Services (AWS), providing virtual machines on demand to customers. EC2 instances come with a pre-installed operating system, and Ubuntu is one of the most popular choices.

When setting up an EC2 instance with Ubuntu, one of the first things you need to do is to set a password. However, if you forget this password or accidentally lose it, then you may find yourself locked out of your instance. In this article, we will discuss the default password for an EC2 Ubuntu instance and provide code examples.

Default Password for Ubuntu EC2 Instance

When setting up an EC2 Ubuntu instance, AWS generates a private key for you to access your instance. Additionally, the default user for an Ubuntu instance is “ubuntu.”

By default, Ubuntu EC2 instances do not have a password set for the “ubuntu” user. Instead, SSH authentication through the private key is used for login. This means that if you forget or lose the private key, you will not be able to access your instance, and you cannot log in with a password.

Resetting the Password for Ubuntu

If you want to set a password for the “ubuntu” user on your EC2 Ubuntu instance, you need to follow these steps:

  1. Log in to your EC2 instance using your private key and SSH:

$ ssh -i ubuntu@

  1. Once you’re logged in, run the following command to set a new password for the “ubuntu” user:

$ sudo passwd ubuntu

  1. Enter a new password for the “ubuntu” user and confirm it.

Now that you have set a password for the “ubuntu” user, you can log in to your EC2 instance using the password and the “ubuntu” user.

Code Examples

Here are some code examples to help you set a password for the “ubuntu” user on your EC2 Ubuntu instance.

Using AWS Command Line Interface (CLI):

  1. Install and configure the AWS CLI on your local machine.

  2. Log in to your EC2 instance using the private key and SSH:

$ ssh -i ubuntu@

  1. Run the following command to set a new password for the “ubuntu” user:

$ aws ssm start-session –target –document-name AWS-RunShellScript –parameters

commands='echo -e "
" | sudo passwd ubuntu'

This command requires the AWS Systems Manager Agent to be installed on your instance. You can check if the agent is installed by running:

$ systemctl status amazon-ssm-agent

If the agent is not installed, you can install it with the following command:

$ sudo amazon-linux-extras install amazon-ssm-agent

Using Python:

  1. Install the Boto3 library:

$ pip install boto3

  1. Create a Boto3 client for Systems Manager:

import boto3

ssm = boto3.client('ssm')

  1. Call the Systems Manager StartSession API to run a shell script on the EC2 instance to set the password:

response = ssm.start_session(Target=, DocumentName='AWS-RunShellScript', Parameters={'commands': ['echo -e "
" | sudo passwd ubuntu']})

Conclusion

Setting a password for the “ubuntu” user on your EC2 Ubuntu instance can be done easily using the commands and code examples provided in this article. However, it is important to remember that SSH authentication using the private key is the recommended way to access your instance. If you forget or lose your private key, then resetting your password may not be an option. It is always a good idea to keep a backup of your private key in a secure location and protect your instance with the appropriate security measures.

here are some more details about some of the previous topics covered in this article.

EC2 Instances

EC2 instances are virtual machines that provide on-demand computing resources such as CPU, memory, and storage. These instances can be launched in minutes, and you can select the instance type that best suits your needs. Amazon EC2 provides a wide range of instance types, from general-purpose instances to compute-optimized instances and memory-optimized instances.

Ubuntu

Ubuntu is a widely used Linux distribution designed for desktop, server, and cloud use. Ubuntu is an open-source and free operating system that is supported by a large global community. Ubuntu is known for its ease of use, stability, and security features. It also has a large repository of packages and software available, making it a popular choice for developers and users.

SSH

SSH stands for Secure Shell, which is a network protocol that provides a secure way to access remote systems. SSH is used to log in to a remote machine securely and execute commands over the network. SSH uses encryption to protect the communication between the client and the server. SSH is widely used by system administrators, developers, and users to perform remote operations securely.

AWS CLI

The AWS Command Line Interface (CLI) is a unified tool that provides a command-line interface for managing AWS services. With the AWS CLI, you can manage various AWS services and resources from your terminal or scripts. The AWS CLI supports a wide range of functions, including EC2 instance management, S3 bucket management, and IAM user management.

Boto3

Boto3 is the AWS SDK for Python, which provides an easy-to-use API for accessing various AWS services. Boto3 allows you to interact with AWS services programmatically from your Python code. With Boto3, you can create, configure, and manage AWS services programmatically. Boto3 provides a range of features, such as flexible authentication options, error handling, and pagination.

Popular questions

  1. What is the Ubuntu user that comes pre-installed on an EC2 Ubuntu instance?

The default user for an EC2 Ubuntu instance is "ubuntu."

  1. What is the default authentication method for logging in to an EC2 Ubuntu instance?

By default, Ubuntu EC2 instances do not have a password set for the "ubuntu" user. Instead, SSH authentication through the private key is used for login.

  1. How can you set a password for the "ubuntu" user on an EC2 Ubuntu instance?

You can set a password for the "ubuntu" user by logging in to your EC2 instance using SSH, and then running the command: "sudo passwd ubuntu" and entering a new password for the user.

  1. What is the AWS CLI, and how can it be used to set a password for the "ubuntu" user on an EC2 Ubuntu instance?

The AWS Command Line Interface (CLI) is a unified tool that provides a command-line interface for managing AWS services. To set a password for the "ubuntu" user using the AWS CLI, you can use the "aws ssm start-session" command with the "AWS-RunShellScript" document name to run a shell script on the EC2 instance to set the password.

  1. What is Boto3, and how can it be used to set a password for the "ubuntu" user on an EC2 Ubuntu instance?

Boto3 is the AWS SDK for Python, which provides an easy-to-use API for accessing various AWS services. To set a password for the "ubuntu" user using Boto3, you can create a Boto3 client for Systems Manager and call the StartSession API to run a shell script on the EC2 instance to set the password.

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