[technique] Question SSH depuis Ubuntu LTS 16.04 vers X via clé ssh

[Hugo SIMANCAS]

Bonjour,

J'ai installé Ubuntu lts 16.05 sur mon pc.
J'avais l'habitude de me connecter à mes serveurs par ssh via des échanges de clés. Ça ne marche plus ... j'ai pourtant remplacé le id_rsa et id_rsa.pub que j'avais préalablement sauvegardé de mon ancient PC.
Avez vous une idée ?

Merci d'avance

hsimancas at HCKL010:~$ ssh root at 10.231.42.123 -v
OpenSSH_7.2p2 Ubuntu-4ubuntu2.1, 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 10.231.42.123 [10.231.42.123] port 22.
debug1: Connection established.
debug1: identity file /home/hsimancas/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/hsimancas/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/hsimancas/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/hsimancas/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/hsimancas/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/hsimancas/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/hsimancas/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/hsimancas/.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-4ubuntu2.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.7p1 Debian-5+deb8u3
debug1: match: OpenSSH_6.7p1 Debian-5+deb8u3 pat OpenSSH* compat 0x04000000
debug1: Authenticating to 10.231.42.123:22 as 'root'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256 at libssh.org
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1305 at openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305 at openssh.com MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:q10Dsvh0j8hvIqOemMbUHzSnHbQa6OCg342T5kUU6Is
debug1: Host '10.231.42.123' is known and matches the ECDSA host key.
debug1: Found key in /home/hsimancas/.ssh/known_hosts:14
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_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/hsimancas/.ssh/id_rsa
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/hsimancas/.ssh/id_dsa
debug1: Trying private key: /home/hsimancas/.ssh/id_ecdsa
debug1: Trying private key: /home/hsimancas/.ssh/id_ed25519
debug1: Next authentication method: password
root at 10.231.42.123's password:


simancas at HCKL010:~/.ssh$ ll
total 24
drwx------  2 hsimancas hsimancas 4096 janv. 20 16:04 ./
drwxr-xr-x 33 hsimancas hsimancas 4096 janv. 20 14:32 ../
-rw-rw-r--  1 hsimancas hsimancas    0 janv. 20 16:04 client
-rw-------  1 hsimancas hsimancas 1679 janv. 20 15:46 id_rsa
-rw-r--r--  1 hsimancas hsimancas  399 janv. 20 15:46 id_rsa.pub
-rw-r--r--  1 hsimancas hsimancas 4430 janv. 20 15:54 known_hosts
-rw-rw-r--  1 hsimancas hsimancas    0 janv. 20 16:04 server
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