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I have a public key in a server(host) that I want to transfer to another server(target).

The host server has a bunch of keys in .ssh/ folder, i want to copy just one of them to the target server (it's not id_rsa.pub, so lets call mykey.rsa.pub).

Also, the target server has the host server key (lets call hostkey.rsa.pub) in .ssh/authorized_keys, for passwordless ssh.

Is it possible to do something like this?

ssh-copy-id mykey.rsa.pub -i hostkey.rsa.pub user@target

26

You can pass ssh options with -o:

ssh-copy-id -i mykey.rsa.pub -o "IdentityFile hostkey.rsa" user@target
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  • 1
    This should be the accepted answer. – mastazi Oct 5 '17 at 4:54
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    Worked for me but I had to add -f before -i. – baptx Mar 21 at 14:40
10

Yes, it is possible something like

ssh-copy-id -f -i hostkey.rsa.pub user@target

with latest version of ssh-copy-id. If you have some older, it might or might not work (with RHEL7 and older Fedora with SSH_COPY_ID_LEGACY=1 environment variable)

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  • Also make sure the -i option is BEFORE user@target. -f might not be needed. – Jerther Sep 22 '17 at 13:05

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