1. 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
KeyPair..............................................................................................................................................1
KeyName / Key Pair........................................................................................................................1
Instance – Public IP.........................................................................................................................2
Copy Key Pair..................................................................................................................................2
Modify Permissions.........................................................................................................................2
Connect Instance – Public IP............................................................................................................3
Connect Instance – Instance............................................................................................................3

2. How To Connect Amazon AWS EC2 with Key Pair – Linux
1 | P a g e
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 PEMKey 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’sgenerated and associated to a new instance whenyou
build it. You can choose existing key pair or create new one.
Note: Whenyou create a newpair ensure that you downloadthe copy of key pair, else youwill not be
able to login to the box.
Key Name / Key Pair
You can identify the keypair 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.

3. How To Connect Amazon AWS EC2 with Key Pair – Linux
2 | P a g e
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

4. How To Connect Amazon AWS EC2 with Key Pair – Linux
3 | P a g e
Connect Instance – Public IP
Upon settingthe permissionof the keypair, connectto the instance withthe publicIP associatedtothe
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