Ssh – How to SSH to a remote server using a private key on Linux

private-keyputtyssh

I have been trying to connect to a remote server using my private key file from the terminal, but it doesn't seem to work. I don't understand why. Here is how I do it:

$ ssh -i private.ppk oap@10.20.0.11
Enter passphrase for key 'private.ppk':
Enter passphrase for key 'private.ppk':
Enter passphrase for key 'private.ppk':
Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

My private key file has 600 mode. I am able to use PuTTY on my Linux box to connect with this private key file. What can be the problem?

Best Answer

This is a putty key. It will not work with *nix ssh clients. You need to use PuTTYgen or similar software in order to convert your key to openssh format.

Related Solutions

SSH key exchange is not working

Try ssh -v this should provide additional information about the authentication process.

debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password,keyboard-interactive,hostbased
debug1: Offering RSA public key: /home/nce/.ssh/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 277

Just to confirm your steps: You created a keypair via ssh-keygen Then you uploaded the key at .ssh/id_rsa.pub to the server(B) and appended it to the .ssh/authorized_keys for the user1.

On server(A) you connect via ssh user1@host? You might try ssh -o PreferredAuthentications=publickey user1@host

And you could provide a special/different identityfile by ssh -i ~/.ssh/serverB/id_rsa user1@host

SSH – Putty Private Key and Passphrase

Putty uses its own format for the key files, not a standard format. ssh can not use ppk files. I believe puttygen should be able to export your key to something more usable for ssh.

Best Answer

Related Solutions

SSH key exchange is not working

SSH – Putty Private Key and Passphrase

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