How to Login to AWS Ec2 instances without using SSH keypair

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Whenever we launch an instance into amazon ec2, we should create one keypair before the instance launches. So that we can ssh into the instance using that key.

==> Usually we would login to aws ubuntu server using the following command,

$ ssh -i bigin.pem [email protected]

$ ssh -i bigin.pem [email protected]

==> But in this case we need to give ssh keypair everytime, it would be little difficult to select the correct path and key everytime

==> To make ssh connection to ec2 instances without keypair we can send our ssh public key[] to the remote ec2 instance, for that

=> we should make sure we have the ssh-agent running in our system to establish secure communication to remote instance,

$ eval $(ssh-agent)

Agent pid 10538

=> Then we should add our keypair,

$ ssh-add /home/user/Downloads/zzz.pem

Identity added: /home/user/Downloads/zzz.pem (/home/user/Downloads/zzz.pem)

=> Then use the normal ssh-copy-id command

:~/.ssh$ ssh-copy-id -i [email protected]

/usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: ""

/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed

/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys

Number of key(s) added: 1

Now try logging into the machine, with: "ssh '[email protected]'"

and check to make sure that only the key(s) you wanted were added.

=> After copy our key to ec2 instance using that command we can login to instance without keypair.

$ ssh [email protected]

Welcome to Ubuntu 14.04.3 LTS (GNU/Linux 3.13.0-74-generic x86_64)

* Documentation:

System information as of Sun Oct 2 05:40:18 UTC 2016

System load: 0.02 Processes: 99

Usage of /: 10.0% of 7.74GB Users logged in: 0

Memory usage: 5% IP address for eth0: ZZ.ZZ.ZZ.ZZ

Swap usage: 0%

Graph this data and manage this system at:

Get cloud support with Ubuntu Advantage Cloud Guest:

0 packages can be updated.

0 updates are security updates.

New release '16.04.1 LTS' available.

Run 'do-release-upgrade' to upgrade to it.

Last login: Sun Oct 2 05:37:06 2016 from AA.AA.AA.AA

[[email protected] ~]$

==> You can also use IP address of the instance to login to instance..

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