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I would like to generate multiple SSH keys for my different servers.

For example:

  • 1 RSA 2048 public/private key for 1.1.1.1
  • 1 ECC public/private key for 2.2.2.3
  • 1 ECC public/private key for 3.3.3.3

I understand the ssh keys are stored in the .ssh folder, but how can I copy the right public keys to the correct servers, and how can I generate multiple SSH keys without writing each-other over? I have read something about the -c command, but do not fully understand if it is able to do what I am requesting.

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  • Short answer: Yes ... longer answer: ssh tries all keys listed in ssh-add -l ... as well as the default identities listed in ~/.ssh/ ... On Copying keys : Try ssh-copy-id Commented Dec 3, 2017 at 1:23
  • when i create a ssh key will it give the ssh key a unique id, or can i name it myself? Commented Dec 3, 2017 at 1:30
  • Crossdupe stackoverflow.com/questions/2419566/… (but you need to look at more than the first answer). -c is not a command; as an option on ssh or ssh-keygen it does (different) things completely unrelated to what you want; as an option on ssh-add it could work but would be very clumsy. Commented Dec 3, 2017 at 7:09

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Yes, you can have multiple SSH keys. I would suggest reading the man page for ssh-keygen: http://man.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man1/ssh-keygen.1?query=ssh-keygen%26sec=1

Use the -f option to specify your own filename.

ssh-keygen -t rsa -f myfirstrsakey
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  • And to use this keyfile, ssh -i file or IdentityFile file in a Host section in .ssh/ssh_config per the crossdupe I linked above. Commented Dec 3, 2017 at 7:09

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