I have two public keys, one for some servers and one for others. How do I specify which key to use when connecting to a server?
Assuming you're on a Unix/Linux environment, you can create or edit the file ~/.ssh/config.
That config file allows you to establish the parameters to use for each host; so, for example:
Host host1
HostName <hostname_or_ip>
IdentityFile ~/.ssh/identity_file1
Host Host2
HostName <hostname_or_ip2>
User differentusername
IdentityFile ~/.ssh/identity_file2
Note that host1 and host2 can also be not hostnames, but rather labels to identify a server.
Now you can log onto the to hosts with:
ssh host1
ssh host2
answered Jul 30 '11 at 8:28
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45You can also use
-i <keyfile>, but I'd definitely recommend the config file method in the general case. – womble♦ Jul 30 '11 at 8:43 -
I tried this but I keep getting prompted of the passphrase for my key. Even when I enter the passphrase correctly, the ssh login doesn't work. I tried using a blank passphrase too – Hamman Samuel Feb 29 '16 at 20:27
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I had to do
ssh differentusername@host2for a proper login, but otherwise this worked wonderfully, thank you! – agrippa Jun 21 '19 at 21:57
On Fedora 27, you can put the private/public keys under ~/.ssh/ and then when you ssh to a host, both of them will be tried automatically.
