Estoy tratando de ejecutar un solo comando invocando ssh (usando la autenticación de clave) de un usuario que no tiene un tty (el usuario con el que se ejecuta mi servidor apache) y sigo obteniendo el siguiente resultado:
OpenSSH_5.9p1, OpenSSL 1.0.0g 18 Jan 2012
Pseudo-terminal will not be allocated because stdin is not a terminal.
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to localhost [::1] port 54367.
debug1: Connection established.
debug1: identity file nonpublic/id_rsa type 1
debug1: identity file nonpublic/id_rsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9
debug1: match: OpenSSH_5.9 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.9
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA e3:c2:37:8e:8b:d4:77:63:7f:d2:ba:12:e5:e9:d1:9a
debug1: checking without port identifier
debug1: read_passphrase: can't open /dev/tty: No such device or address
Host key verification failed.
El indicador -t se establece al invocar ssh. La clave no tiene una frase de contraseña, lo que debería suprimir la necesidad de cualquier entrada, pero aparentemente no la tiene. ¿Cómo puedo evitar que ssh intente abrir / dev / tty?
Editar: ¿las etiquetas de código no funcionan?
Edit2: comando ssh completo:
ssh -i nonpublic/id_rsa -l username -p 54367 -t -v username@localhost /home/username/minecraftserver/Scripts/start 2>&1
He reemplazado mi nombre de usuario con "nombre de usuario".
Edit3: probé ssh-ing usando la misma clave que root y obtuve este resultado:
OpenSSH_5.9p1, OpenSSL 1.0.0g 18 Jan 2012
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to localhost [::1] port 54367.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /srv/http/nonpublic/id_rsa type 1
debug1: identity file /srv/http/nonpublic/id_rsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9
debug1: match: OpenSSH_5.9 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.9
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA e3:c2:37:8e:8b:d4:77:63:7f:d2:ba:12:e5:e9:d1:9a
debug1: checking without port identifier
The authenticity of host '[localhost]:54367 ([::1]:54367)' can't be established.
ECDSA key fingerprint is e3:c2:37:8e:8b:d4:77:63:7f:d2:ba:12:e5:e9:d1:9a.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '[localhost]:54367' (ECDSA) to the list of known hosts.
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /srv/http/nonpublic/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug1: key_parse_private_pem: PEM_read_PrivateKey failed
debug1: read PEM private key done: type <unknown>
Enter passphrase for key '/srv/http/nonpublic/id_rsa':
debug1: No more authentication methods to try.
Permission denied (publickey).
Me pide una frase de contraseña aunque no debería necesitarla. Además, puedo usar la clave para ssh usando PuTTY en una máquina con Windows muy bien y no me pide una frase de contraseña.
Edit4: agregué el servidor a los usuarios de apache known_hosts y ahora obtengo esto:
OpenSSH_5.9p1, OpenSSL 1.0.0g 18 Jan 2012
Pseudo-terminal will not be allocated because stdin is not a terminal.
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to localhost [::1] port 54367.
debug1: Connection established.
debug1: identity file nonpublic/id_rsa type 1
debug1: identity file nonpublic/id_rsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9
debug1: match: OpenSSH_5.9 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.9
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA e3:c2:37:8e:8b:d4:77:63:7f:d2:ba:12:e5:e9:d1:9a
debug1: Host '[localhost]:54367' is known and matches the ECDSA host key.
debug1: Found key in /srv/http/.ssh/known_hosts:1
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: nonpublic/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug1: key_parse_private_pem: PEM_read_PrivateKey failed
debug1: read PEM private key done: type
debug1: read_passphrase: can't open /dev/tty: No such device or address
debug1: No more authentication methods to try.
Permission denied (publickey).`
Además, este es el contenido de known_hosts:
[localhost]:54367 ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBILr7jLp5CeYfyrCroaDjkaWgDHXRrQD+G8Fz/CQOY1PcluUFTkrN447bXmC6R27LOClE+RPaveYb4MOlObpGGE=
¿Por qué dice ecdsa? Es una clave rsa.
Edit5: Resuelto. El problema fue que el par de claves fue generado por PuTTY, que escribe la clave privada en un formato que no es compatible con OpenSSH. Solución proporcionada por cjc en un comentario.
-t
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