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Oskar K.
Asked: 2014-10-29 18:49:08 +0800 CST

Copy the rsa keys from one machine to another

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Someone asked me to provide my public id_rsa key to make be able to connect to their server via ssh. I did so and it's working fine. I want to do that from my another laptop as well without having to bother them. If I just copy a public and a private keys from my first laptop to the second one, will it allow me to connect to the server? Note I already have a private and public rsa keys on my second laptop that are, of course, different from the ones from the first laptop.

What's the best way to do so - copy the keys?

ssh

2 Answers

  1. You can manually add the public key for your second laptop to the server. Just edit the .ssh/authorized_keys file in your home directory and append your second public key.

    To get this, on your second laptop, run

    cat .ssh/id_rsa.pub
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  2. You can copy your key (both id_rsa and id_rsa.pub) to you server B with a new name like serverA_key and serverA_key.pub to connect from serverB with this key you can give ssh the path to your new key

    ssh -i serverA_key target_server

    or add this to your .ssh/config on serverB

    Host target_server
  IdentityFile /path/to/serverA_key
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