Generating Ssh Key Aws S3

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I want to add new user accounts that can connect to my Amazon Elastic Compute Cloud (Amazon EC2) Linux instance using SSH. How do I do that?

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Jul 21, 2018 Generating AWS Access Key ID and Secret Access Key. Now you can easily access this account using your Access key and Secret Access key of your AWS account. If you dont have one already then go to your account and click on My Security Credentials. And then select Access keys (access key ID and secret access key) section.
To generate new access keys, click the Create New Access Key button. After clicking the Create new access key button the screen will appear like the following. Click Show Access Key to have it displayed on the screen. Note, that you can download it to your machine as a file and open it whenever needed.

Short Description

Every Amazon EC2 Linux instance launches with a default system user account with administrative access to the instance. If multiple users require access to the instance, it's a security best practice to use separate accounts for each user.

How to create an AWS access key for an existing IAM user. In the video on the right, Deren shows you how to create an access key ID for a new IAM user. I need an AWS access key to allow a program, script, or developer to have programmatic access to the resources on my AWS account. How do I create a new access key? The following get-ssh-public-key command retrieves the specified SSH public key from the IAM user sofia. The output is in SSH encoding. The output is in SSH encoding. Aws iam get-ssh-public-key -user-name sofia -ssh-public-key-id APKA123456789EXAMPLE -encoding SSH.

Amazon EC2 Key Pairs. Amazon EC2 uses public–key cryptography to encrypt and decrypt login information. Public–key cryptography uses a public key to encrypt a piece of data, and then the recipient uses the private key to decrypt the data. The public and private keys are known as a key pair. The aws s3 cp command copies the users public keys from the S3 folder to their.ssh/authorizedkeys path. The last section is to run commands as admin without needing passwords. There are lots of security improvements that can be recommended here.

You can expedite these steps by using cloud-init and user data. For more information, see How can I give a user permissions to connect to my EC2 Linux instance using SSH?

Resolution

Create a key pair for the new user account

Create a key pair, or use an existing one, for the new user.
If you create your own key pair using the command line, follow the recommendations at create-key-pair or New-EC2KeyPair Cmdlet for key type and bit length.
If you create your own key pair using a third-party tool, be sure that your key matches the guidelines at Importing Your Own Public Key to Amazon EC2.

Add a new user to the EC2 Linux instance

1. Connect to your Linux instance using SSH.

2. Use the adduser command to add a new user account to an EC2 instance (replace new_user with the new account name). The following example creates an associated group, home directory, and an entry in the /etc/passwd file of the instance:

Note: If you add the new_user to an Ubuntu instance, include the --disabled-password option to avoid adding a password to the new account:

3. Change the security context to the new_user account so that folders and files you create have the correct permissions:

Note: When you run the sudo su - new_user command, the name at the top of the command shell prompt changes to reflect the new user account context of your shell session.

4. Create a .ssh directory in the new_user home directory:

5. Use the chmod command to change the .ssh directory's permissions to 700. Changing the permissions restricts access so that only the new_user can read, write, or open the .ssh directory.

6. Use the touch command to create the authorized_keys file in the .ssh directory:

7. Use the chmod command to change the .ssh/authorized_keys file permissions to 600. Changing the file permissions restricts read or write access to the new_user.

Retrieve the public key for your key pair

Retrieve the public key for your key pair using the method that applies to your configuration:

Verify your key pair's fingerprint/watch-dogs-keygen-cd-key-generator-free-download.html.

After you import your own public key or retrieve the public key for your key pair, follow the steps at Verifying Your Key Pair's Fingerprint.

Update and verify the new user account credentials

After you retrieve the public key, use the command shell session that is running under the context of the new user account to confirm that you have permission to add the public key to the .ssh/authorized_keys file for this account:

1. Run the Linux cat command in append mode:

2. Paste the public key into the .ssh/authorized_keys file and then press Enter.

Note: For most Linux command line interfaces, the Ctrl+Shift+V key combination pastes the contents of the clipboard into the command line window. For the PuTTY command line interface, right-click to paste the contents of the clipboard into the PuTTY command line window.

3. Press and hold Ctrl+d to exit cat and return to the command line session prompt.

(Optional) Allow the new user to use sudo

Note: If you don't want to allow the new user to use sudo, proceed to Verify that the new user can use SSH to connect to the EC2 instance.

1. Use the passwd command to create a password for the new user:

Note: You're prompted to reenter the password. Enter the password a second time to confirm it.

2. Add the new user to the correct group.

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For Amazon Linux, Amazon Linux 2, RHEL, and CentOS:

Use the usermod command to add the user to the wheel group.

For Ubuntu:

Use the usermod command to add the user to the sudo group.

Verify that the new user can use SSH to connect to the EC2 instance

1. Verify that you can connect to your EC2 instance when using ssh as the new_user by running the following command from a command line prompt on your local computer:

To connect to your EC2 Linux instance using SSH from Windows, follow the steps at Connecting to Your Linux Instance from Windows Using PuTTY.

2. After you connect to your instance as the new_user by using SSH, run the id command from the EC2 instance command line to view the user and group information created for the new_user account:

The id command returns information similar to the following:

3. Distribute the private key file to your new user.

Related Information

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Short Description

To use a single SSH key pair for all your AWS Regions, first generate a public SSH key from a private SSH key. Then, import the key into each of your AWS Regions.

Resolution

If you don't have one already, begin by creating an SSH key pair.

Linux

1. Generate a public SSH key (.pub) file from the private SSH key (.pem) file:

Note: Replace MyKeyPair.pem with the name of your private .pem file. Make sure that you are working on a bash shell and that the AWS CLI is configured with a user that has valid access.

2. Run the following command to set the AWS_REGIONS:

3. Run the following command to import the public SSH key into the Regions:

Windows

Aws Create Ssh Key Pair

1. Generate a public SSH key (.pub) file from the private SSH key (.pem) file:

Open PuTTYgen.

Choose Load to load your private key file.