How To Connect Amazon AWS EC2 with Key Pair – Linux

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Table of Contents Overview ....................................................................................................................................................... 1

Applies To ...................................................................................................................................................... 1

Pre-requisites ................................................................................................................................................ 1

Key Pair ......................................................................................................................................................... 1

Key Name / Key Pair .................................................................................................................................. 1

Instance – Public IP ................................................................................................................................... 2

Copy Key Pair ............................................................................................................................................ 2

Modify Permissions ................................................................................................................................... 2

Connect Instance – Public IP ..................................................................................................................... 3

Connect Instance – Instance ..................................................................................................................... 3

How To Connect Amazon AWS EC2 with Key Pair – Linux

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Overview

The purpose of this guide is to assist the users to connect the Amazon AWS EC2 Instance(s). This guide

demonstrate connecting from a Linux host.

Applies To

Linux Server (Instance)

Pre-requisites

Key Pair associated with the EC2 Instance

Download and copy PEM Key to the Linux Box, from where you would like to connect

Open inbound connection rule for port “22” on the security group associated to the instance

Public IP association

Key Pair

A key pair is an encrypted RSA Private Key that’s generated and associated to a new instance when you

build it. You can choose existing key pair or create new one.

Note: When you create a new pair ensure that you download the copy of key pair, else you will not be

able to login to the box.

Key Name / Key Pair

You can identify the key pair associated to each instance in the “Key Name”. It is the key pair filename

that is associated when you create a new instance from the Amazon AWS Console.

How To Connect Amazon AWS EC2 with Key Pair – Linux

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Instance – Public IP

Identify the public IP for the instance, you can find in the instance’s “Public IP” field.

Copy Key Pair

Copy the key pair to the host wherein you are trying to login.

Modify Permissions

Modify the permission for the key pair to “400”, run the below command.

chmod 400 effoneblr.pem

How To Connect Amazon AWS EC2 with Key Pair – Linux

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Connect Instance – Public IP

Upon setting the permission of the key pair, connect to the instance with the public IP associated to the

instance, invoke the below command

ssh -i "effoneblr.pem" ubuntu@52.1.89.122

Note: Public IP has to be associated to the instance to connect.

Connect Instance – Instance