Question

Installing public SSH key

Posted May 8, 2014 5.4k views
Hello there. I need to add a public ssh key (from codeship.io) to my Ubuntu 12.04 machine. I have added the key to ~/.ssh/authorized_keys/id_rsa.pub and after that restarted ssh (sudo service ssh restart). However. I'm still not able to log into the server from codeship, so I'd like to know if the public key has been installed correctly. Is there a way to verify it? Thanks.
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asb May 8, 2014
You don't need to copy 
~/.ssh/authorized_keys/id_rsa.pub
itself to the server. You need to copy its contents into the file 
~/.ssh/authorized_keys
on the server. That file can contain multiple public keys that you have authorized to access your server.

Check out this article for all the info:

https://digitalocean.com/community/articles/how-to-set-up-ssh-keys--2

To make a long story short, you could do it like so: 


cat ~/.ssh/id_rsa.pub | ssh user@123.45.56.78 "cat >> ~/.ssh/authorized_keys"
How To Set Up SSH Keys
by Etel Sverdlov
SSH keys provide a more secure way of logging into a virtual private server with SSH than using a password alone. With SSH keys, users can log into a server without a password. This tutorial explains how to generate, use, and upload an SSH Key Pair.
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