Gfrktyl

I copied my public key to ~/.ssh/authorized_keys on the server. Now I'm trying to establish an ssh connection, but it doesn't work.

This is the output from ssh -v (server domain and ip address redacted)

OpenSSH_7.2p2 Ubuntu-4ubuntu2.5, OpenSSL 1.0.2g  1 Mar 2016

debug1: Reading configuration data /etc/ssh/ssh_config

debug1: /etc/ssh/ssh_config line 19: Applying options for *

debug1: Connecting to <Server> [ip] port 22.

debug1: Connection established.

debug1: identity file /var/lib/jenkins/.ssh/id_rsa type 1

debug1: key_load_public: No such file or directory

debug1: identity file /var/lib/jenkins/.ssh/id_rsa-cert type -1

debug1: key_load_public: No such file or directory

debug1: identity file /var/lib/jenkins/.ssh/id_dsa type -1

debug1: key_load_public: No such file or directory

debug1: identity file /var/lib/jenkins/.ssh/id_dsa-cert type -1

debug1: key_load_public: No such file or directory

debug1: identity file /var/lib/jenkins/.ssh/id_ecdsa type -1

debug1: key_load_public: No such file or directory

debug1: identity file /var/lib/jenkins/.ssh/id_ecdsa-cert type -1

debug1: key_load_public: No such file or directory

debug1: identity file /var/lib/jenkins/.ssh/id_ed25519 type -1

debug1: key_load_public: No such file or directory

debug1: identity file /var/lib/jenkins/.ssh/id_ed25519-cert type -1

debug1: Enabling compatibility mode for protocol 2.0

debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.5

debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu2.6

debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu2.6 pat OpenSSH* compat 0x04000000

debug1: Authenticating to <server>:<port> as 'jenkins'

debug1: SSH2_MSG_KEXINIT sent

debug1: SSH2_MSG_KEXINIT received

debug1: kex: algorithm: curve25519-sha256@libssh.org

debug1: kex: host key algorithm: ecdsa-sha2-nistp256

debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none

debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: <implicit> compression: none

debug1: expecting SSH2_MSG_KEX_ECDH_REPLY

debug1: Server host key: ecdsa-sha2-nistp256 SHA256:oDdpyTTKXVwLAF7RvyrBmTdtiYusX9Kh5unb/IVhQT0

debug1: Host <server> is known and matches the ECDSA host key.

debug1: Found key in /var/lib/jenkins/.ssh/known_hosts:5

debug1: rekey after 134217728 blocks

debug1: SSH2_MSG_NEWKEYS sent

debug1: expecting SSH2_MSG_NEWKEYS

debug1: rekey after 134217728 blocks

debug1: SSH2_MSG_NEWKEYS received

debug1: SSH2_MSG_EXT_INFO received

debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>

debug1: SSH2_MSG_SERVICE_ACCEPT received

debug1: Authentications that can continue: publickey

debug1: Next authentication method: publickey

debug1: Offering RSA public key: /var/lib/jenkins/.ssh/id_rsa

debug1: Authentications that can continue: publickey

debug1: Trying private key: /var/lib/jenkins/.ssh/id_dsa

debug1: Trying private key: /var/lib/jenkins/.ssh/id_ecdsa

debug1: Trying private key: /var/lib/jenkins/.ssh/id_ed25519

debug1: No more authentication methods to try.

Already made sure to assign the correct permissions to the content of .ssh on the server and I have another uxder being able to login to the server using public key.

Any idea what the problem might be?

ssh-copy-id takes the guesswork out of migrating keys to your machines. To copy your default key you just run:

ssh-copy-id user@newserver.com

If you have multiple SSH keys that you use you can use the -i flag to indicate which one you want to send to the new machine. Like so:

ssh-copy-id -i /path/to/new_id_rsa user@newserver.com

I copied my public key to ~/.ssh/authorized_keys on the server.

This is the problem. You must copy private key.