[Hadoop]SSH免密码登录以及失败解决方案

xiaosi@xiaosi:~$ ssh-keygen -t rsa -f ~/.ssh/id_rsa

Generating public/private rsa key pair.

Created directory '/home/xiaosi/.ssh'.

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /home/xiaosi/.ssh/id_rsa.

Your public key has been saved in /home/xiaosi/.ssh/id_rsa.pub.

The key fingerprint is:

SHA256:n/sFaAT94A/xxxxxxxxxxxxxxxxxxxxxxx xiaosi@xiaosi

The key's randomart image is:

+---[xxxxx]----+

|        o= .. .. |

|        o.= ..  .|

|         *.* o  .|

|        +.4.=E+..|

|       .SBo=. h+ |

|        ogo..oo. |

|          or +j..|

|          ...+o=.|

|          ... o=+|

+----[xxxxx]-----+

xiaosi@xiaosi:~$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

xiaosi@xiaosi:~$ ssh -vvv localhost

OpenSSH_7.2p2 Ubuntu-4ubuntu1, OpenSSL 1.0.2g-fips  1 Mar 2016

debug1: Reading configuration data /etc/ssh/ssh_config

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

debug2: resolving "localhost" port 22

debug2: ssh_connect_direct: needpriv 0

debug1: Connecting to localhost [127.0.0.1] port 22.

debug1: Connection established.

debug1: identity file /home/xiaosi/.ssh/id_rsa type 1

debug1: key_load_public: No such file or directory

debug1: identity file /home/xiaosi/.ssh/id_rsa-cert type -1

debug1: key_load_public: No such file or directory

debug1: identity file /home/xiaosi/.ssh/id_dsa type -1

debug1: key_load_public: No such file or directory

debug1: identity file /home/xiaosi/.ssh/id_dsa-cert type -1

debug1: key_load_public: No such file or directory

debug1: identity file /home/xiaosi/.ssh/id_ecdsa type -1

debug1: key_load_public: No such file or directory

debug1: identity file /home/xiaosi/.ssh/id_ecdsa-cert type -1

debug1: key_load_public: No such file or directory

debug1: identity file /home/xiaosi/.ssh/id_ed25519 type -1

debug1: key_load_public: No such file or directory

debug1: identity file /home/xiaosi/.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-4ubuntu1

debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2p2 Ubuntu-4ubuntu1

debug1: match: OpenSSH_7.2p2 Ubuntu-4ubuntu1 pat OpenSSH* compat 0x04000000

debug2: fd 3 setting O_NONBLOCK

debug1: Authenticating to localhost:22 as 'xiaosi'

debug3: hostkeys_foreach: reading file "/home/xiaosi/.ssh/known_hosts"

debug3: record_hostkey: found key type ECDSA in file /home/xiaosi/.ssh/known_hosts:1

debug3: load_hostkeys: loaded 1 keys from localhost

debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521

debug3: send packet: type 20

debug1: SSH2_MSG_KEXINIT sent

debug3: receive packet: type 20

debug1: SSH2_MSG_KEXINIT received

debug2: local client KEXINIT proposal

debug2: KEX algorithms: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,ext-info-c

debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa

debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc

debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc

debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1

debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1

debug2: compression ctos: none,zlib@openssh.com,zlib

debug2: compression stoc: none,zlib@openssh.com,zlib

debug2: languages ctos:

debug2: languages stoc:

debug2: first_kex_follows 0

debug2: reserved 0

debug2: peer server KEXINIT proposal

debug2: KEX algorithms: curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1

debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519

debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com

debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com

debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1

debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1

debug2: compression ctos: none,zlib@openssh.com

debug2: compression stoc: none,zlib@openssh.com

debug2: languages ctos:

debug2: languages stoc:

debug2: first_kex_follows 0

debug2: reserved 0

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

debug3: send packet: type 30

debug1: expecting SSH2_MSG_KEX_ECDH_REPLY

debug3: receive packet: type 31

debug1: Server host key: ecdsa-sha2-nistp256 SHA256:378enl3ckhdpObP8fnsHr1EXz4d1q2Jde+jUplkub/Y

debug3: hostkeys_foreach: reading file "/home/xiaosi/.ssh/known_hosts"

debug3: record_hostkey: found key type ECDSA in file /home/xiaosi/.ssh/known_hosts:1

debug3: load_hostkeys: loaded 1 keys from localhost

debug1: Host 'localhost' is known and matches the ECDSA host key.

debug1: Found key in /home/xiaosi/.ssh/known_hosts:1

debug3: send packet: type 21

debug2: set_newkeys: mode 1

debug1: rekey after 134217728 blocks

debug1: SSH2_MSG_NEWKEYS sent

debug1: expecting SSH2_MSG_NEWKEYS

debug3: receive packet: type 21

debug2: set_newkeys: mode 0

debug1: rekey after 134217728 blocks

debug1: SSH2_MSG_NEWKEYS received

debug2: key: /home/xiaosi/.ssh/id_rsa (0x5602df5e80c0)

debug2: key: /home/xiaosi/.ssh/id_dsa ((nil))

debug2: key: /home/xiaosi/.ssh/id_ecdsa ((nil))

debug2: key: /home/xiaosi/.ssh/id_ed25519 ((nil))

debug3: send packet: type 5

debug3: receive packet: type 7

debug1: SSH2_MSG_EXT_INFO received

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

debug3: receive packet: type 6

debug2: service_accept: ssh-userauth

debug1: SSH2_MSG_SERVICE_ACCEPT received

debug3: send packet: type 50

debug3: receive packet: type 51

debug1: Authentications that can continue: publickey,password

debug3: start over, passed a different list publickey,password

debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password

debug3: authmethod_lookup publickey

debug3: remaining preferred: keyboard-interactive,password

debug3: authmethod_is_enabled publickey

debug1: Next authentication method: publickey

debug1: Offering RSA public key: /home/xiaosi/.ssh/id_rsa

debug3: send_pubkey_test

debug3: send packet: type 50

debug2: we sent a publickey packet, wait for reply

debug3: receive packet: type 51

debug1: Authentications that can continue: publickey,password

debug1: Trying private key: /home/xiaosi/.ssh/id_dsa

debug3: no such identity: /home/xiaosi/.ssh/id_dsa: No such file or directory

debug1: Trying private key: /home/xiaosi/.ssh/id_ecdsa

debug3: no such identity: /home/xiaosi/.ssh/id_ecdsa: No such file or directory

debug1: Trying private key: /home/xiaosi/.ssh/id_ed25519

debug3: no such identity: /home/xiaosi/.ssh/id_ed25519: No such file or directory

debug2: we did not send a packet, disable method

debug3: authmethod_lookup password

debug3: remaining preferred: ,password

debug3: authmethod_is_enabled password

debug1: Next authentication method: password

xiaosi@localhost's password:

xiaosi@xiaosi:~$ ssh localhost

The authenticity of host 'localhost (127.0.0.1)' can't be established.

ECDSA key fingerprint is SHA256:378enl3ckhdpObP8fnsHr1EXz4d1q2Jde+jUplkub/Y.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'localhost' (ECDSA) to the list of known hosts.

sign_and_send_pubkey: signing failed: agent refused operation

xiaosi@localhost's password:

xiaosi@xiaosi:~$ chmod 600 ~/.ssh/authorized_keys

xiaosi@xiaosi:~$ ssh localhost

Welcome to Ubuntu 16.04 LTS (GNU/Linux 4.4.0-24-generic x86_64)

* Documentation:  https://help.ubuntu.com/

0 个可升级软件包。

0 个安全更新。

Last login: Thu Jun 16 08:05:50 2016 from 127.0.0.1