Can we access EC2 without key pair?

There are multiple ways you can connect to your EC2 instance through session manager, for example, you can connect through AWS EC2 console or AWS SSM console or through AWS CLI or using SSH.
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How do I access EC2 instance without SSH?

The EC2 instance should have a IAM role attached so that Session Manager can access it.
...
Assign IAM policy to EC2 instance
  1. Login to AWS Console.
  2. Open EC2 Dashboard.
  3. Select target EC2 instance in list.
  4. Right click on EC2 instance and select “Instance Settings -> Attach/Replace IAM Role” as shown in figure.
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How do I connect to EC2 instance without PEM?

4 Answers
  1. Login into your instance with the .pem file.
  2. Update.
  3. sudo su.
  4. cd / (just incase)
  5. Edit, vim /etc/ssh/sshd_config and edit or do the equivilent of uncommenting these lines: ...
  6. Restart sshd service, service sshd restart or systemctl restart sshd or equivilent.
  7. Set password, passwd.
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Do I need a key pair AWS?

You must provide the key pair to Amazon EC2 when you create the instance, and then use that key pair to authenticate when you connect to the instance. For additional command examples, see the AWS CLI reference guide .
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How can I connect to my Amazon EC2 instance if I lost my SSH key pair after its initial launch?

How To Recover Access To Your AWS Instance After Losing Your...
  1. Gather config details of the original(target) instance.
  2. Power off the original(target) EC2 instance of which you want to regain access.
  3. Launch new (recovery) instance and generate new key-pair.
  4. Login via ssh to the new recovery instance.
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How to connect to an EC2 instance without a key pair / Access EC2 with the AWS SSM Session Manager



What happens if EC2 key pair is lost?

If you've lost the key pair, you can create an AMI of the existing instance, and then launch a new instance. You can then select a new key pair by following the instance launch wizard.
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How do I access my EC2 instance?

Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/ .
  1. In the navigation pane, choose Instances.
  2. Select the instance and choose Connect.
  3. Choose EC2 Instance Connect.
  4. Verify the user name and choose Connect to open a terminal window.
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What is the purpose of key pair?

A key pair is a combination of a public key that is used to encrypt data and a private key that is used to decrypt data.
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Can an EC2 instance have multiple key pairs?

EC2 doesn't support multiple Key Pairs by default. And updating Key Pairs (adding new keys, replacing existing keys, or deleting existing keys) is not supported by default. User Data allows you to deploy a bunch of Key Pairs on an EC2 instance during bootstrapping.
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How do I SSH into an EC2 instance?

Connect to your EC2 Instance
  1. Open your terminal and change directory with command cd, where you downloaded your pem file. ...
  2. Type the SSH command with this structure: ssh -i file.pem username@ip-address. ...
  3. After pressing enter, a question will prompt to add the host to your known_hosts file. ...
  4. And that's it!
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How do I associate key pairs with an EC2 instance?

Create a key-value pair from EC2 -> Key Pairs (Under NETWORK & SECURITY tab) Go to Elasticbeanstalk and click on your application. Go to configuration page and modify security settings. Choose your EC2 key pair and click Apply.
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How do I access my EC2 instance username and password?

How to Enable Password Authentication in AWS ec2 Instances
  1. Login to AWS instances. ssh -i your-key.pem username@ip_address.
  2. Setup a password for the user using passwd command along with the username.
  3. Edit sshd_config file.
  4. Restart the SSH service. ...
  5. Now we can log in using the password you set for the user.
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How does EC2 instance connect work?

Amazon EC2 Instance Connect provides a simple and secure way to connect to your Linux instances using Secure Shell (SSH). With EC2 Instance Connect, you use AWS Identity and Access Management (IAM) policies and principals to control SSH access to your instances, removing the need to share and manage SSH keys.
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What can you use to configure your EC2 instances without having to establish a RDP or SSH connection to each instance?

What can you use to configure your EC2 instances without having to establish a RDP or SSH connection to each instance? You can use Run Command from the console to configure instances without having to login to each instance.
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What is AWS Run command?

Run Command allows you to automate common administrative tasks and perform one-time configuration changes at scale. You can use Run Command from the AWS Management Console, the AWS Command Line Interface (AWS CLI), AWS Tools for Windows PowerShell, or the AWS SDKs. Run Command is offered at no additional cost.
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Can I create a new key pair for EC2 instance?

You can use Amazon EC2 to create your key pairs. You can also use a third-party tool to create your key pairs, and then import the public keys to Amazon EC2. Amazon EC2 supports ED25519 and 2048-bit SSH-2 RSA keys for Linux instances. You can have up to 5,000 key pairs per Region.
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Can I use same key pair in different regions?

To do this, go to the Key Pair EC2 Console in your target region. Click on Action >> Import Key Pair. Fill up Name. Usually, it is just the same name as your Key Pair from the region you are copying from.
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What is SSH key pair?

The SSH key pair is used to authenticate the identity of a user or process that wants to access a remote system using the SSH protocol. The public key is used by both the user and the remote server to encrypt messages. On the remote server side, it is saved in a file that contains a list of all authorized public keys.
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Where is PEM file on EC2 instance?

The pem key (private key) file is on your local PC. The EC2 machine has only the public key. If you want to scp from one EC2 to another EC2 instance that are launched using the same keypair, you have to transfer your pem key file to one of your EC2 machines.
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How do I access EC2 instance from System Manager?

Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/ .
  1. In the navigation pane, choose Instances.
  2. Select the instance and choose Connect.
  3. For Connection method, choose Session Manager.
  4. Choose Connect.
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How do I access AWS server?

Sign in to the AWS Management Console and open the Amazon EC2 console at https://console.aws.amazon.com/ec2/ .
  1. In the navigation pane, under Instances, choose Instances.
  2. Browse to and choose your Windows Server instance in the list.
  3. Choose Connect.
  4. Choose Get Password, and then choose Choose File.
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How many ways can you connect an EC2 instance?

There are three different ways to connect. Let's start with the most involved one: regular SSH access. As you can see, sending the SSH public key to the instance is an involved command, and as a two-step process, it's not as smooth as it can be. Which is why AWS also provides the EC2 Instance Connect CLI.
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What do I do if I lost my PEM file?

HOW TO ACCESS EC2 INSTANCE EVEN IF PEM FILE IS LOST
  1. First, create a new instance by creating new access file, call it 'helper' instance with same region and VPC as of the lost pem file instance.
  2. Now stop the lost pem file instance. ...
  3. Go to EBS volumes, select the root volume of the lost pem file instance and detach.
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Can you recover lost private key?

Please take note that if a private key is lost, there is no way to either recover it or to regenerate it. However, aside from the private key, there are also other ways you can use to import your wallet address and ultimately recover the tokens in them.
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