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Maca
Asked: 2011-12-02 23:04:16 +0800 CST

How do I SCP file between two Amazon EC2 server?

  • 772

I am on Amazon AWS and I have two EC2 instance on my account. Trying to send rsa key via SSH to another EC2 instance using internal private IP. But its not working.

scp -i .ssh/id_rsa.pub xxx.xxx.xxx.xxx:/root/.ssh/authorized_keys2

What am I doing wrong and how do I send file to another EC2 account with ssh.

amazon-ec2 ssh scp

5 Answers

  1. Best Answer

    Here the scp format:

    scp -i <key> <what_to_copy> <where_to_copy>

    You are missing <what_to_copy> in the example.

    Also check the security group of the target server. It should allow the connections either the the security group of the source sever or from the 10.0.0.0/8 network.

    • 6

  2. This won't completely replace the authorized_keys file, so you can continue logging in with previous access:

    cat .ssh/id_rsa.pub | ssh -i key.pem [email protected] 'cat >>.ssh/authorized_keys'

    where "USER" might be "root", "ec2-user", or "ubuntu", depending on the AMI you are running.

    Or, just start your EC2 instances using your personal ssh keys in the first place. Here's an article I wrote about that:

    Uploading Personal ssh Keys to Amazon EC2
    http://alestic.com/2010/10/ec2-ssh-keys

    • 2

  3. You are probably using the 10.x.x.x-ip of the instance. This won't work. Use the external path. (something like ec2-75-102-166-16.compute-1.amazonaws.com). Or attach an elastic IP to it and use that.

    • 1

  4. I've moved my key to ~/.ssh then created the file ~/.ssh/config(or appended to it) with: 

    IdentityFile ~/.ssh/key.pem

    This will let you ssh and scp without ever specifying the key location.

    • 1

  5. I had this same issue today. Here is my script for a number of files:

     #!/bin/bash

files=(

/var/www/test1.txt

/var/www/test2.txt

)

from="XXX"

to="YYY"

for i in "${files[@]}"

do

  scp -3 -i ~/.ssh/AAA.pem ubuntu@$from:$i ubuntu@$to:$i

done

    I hope this helps! :)

    • 1