我正在努力执行
ssh localhost
在Ubuntu 14.04 LTS,但得到
Permission denied (publickey).
这是一些调试信息……
首先,我在〜/ .ssh目录中有以下文件:
ubuntu@<hostname>:~$ls .ssh authorized_keys id_dsa id_dsa.pub id_ecdsa id_ecdsa.pub id_ed25519 id_ed25519.pub id_rsa id_rsa.pub kNown_hosts
对目录的访问权限是:
ubuntu@<hostname>:~# stat -c %a ~/.ssh 700
这是sshing的详细输出:
ubuntu@<hostname>:~$ssh -vvv localhost OpenSSH_6.6.1,OpenSSL 1.0.1f 6 Jan 2014 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to localhost [::1] port 22. debug1: Connection established. debug3: Incorrect RSA1 identifier debug3: Could not load "/home/ubuntu/.ssh/id_rsa" as a RSA1 public key debug1: identity file /home/ubuntu/.ssh/id_rsa type 1 debug1: identity file /home/ubuntu/.ssh/id_rsa-cert type -1 debug3: Incorrect RSA1 identifier debug3: Could not load "/home/ubuntu/.ssh/id_dsa" as a RSA1 public key debug1: identity file /home/ubuntu/.ssh/id_dsa type 2 debug1: identity file /home/ubuntu/.ssh/id_dsa-cert type -1 debug3: Incorrect RSA1 identifier debug3: Could not load "/home/ubuntu/.ssh/id_ecdsa" as a RSA1 public key debug1: identity file /home/ubuntu/.ssh/id_ecdsa type 3 debug1: identity file /home/ubuntu/.ssh/id_ecdsa-cert type -1 debug3: Incorrect RSA1 identifier debug3: Could not load "/home/ubuntu/.ssh/id_ed25519" as a RSA1 public key debug1: identity file /home/ubuntu/.ssh/id_ed25519 type 4 debug1: identity file /home/ubuntu/.ssh/id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 debug1: Remote protocol version 2.0,remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2 pat OpenSSH_6.6.1* compat 0x04000000 debug2: fd 3 setting O_NONBLOCK debug3: load_hostkeys: loading entries for host "localhost" from file "/home/ubuntu/.ssh/kNown_hosts" debug3: load_hostkeys: found key type ECDSA in file /home/ubuntu/.ssh/kNown_hosts:1 debug3: load_hostkeys: loaded 1 keys 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 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: 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,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-dss-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-dss-cert-v00@openssh.com,ssh-ed25519,ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,chacha20-poly1305@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: aes128-ctr,rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib debug2: kex_parse_kexinit: none,zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: curve25519-sha256@libssh.org,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ssh-ed25519 debug2: kex_parse_kexinit: aes128-ctr,zlib@openssh.com debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_setup: setup hmac-md5-etm@openssh.com debug1: kex: server->client aes128-ctr hmac-md5-etm@openssh.com none debug2: mac_setup: setup hmac-md5-etm@openssh.com debug1: kex: client->server aes128-ctr hmac-md5-etm@openssh.com none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ECDSA 4a:79:23:54:0b:5a:2c:98:39:ed:e4:b4:6b:5b:84:fa debug3: load_hostkeys: loading entries for host "localhost" from file "/home/ubuntu/.ssh/kNown_hosts" debug3: load_hostkeys: found key type ECDSA in file /home/ubuntu/.ssh/kNown_hosts:1 debug3: load_hostkeys: loaded 1 keys debug1: Host 'localhost' is kNown and matches the ECDSA host key. debug1: Found key in /home/ubuntu/.ssh/kNown_hosts:1 debug1: ssh_ecdsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: Roaming not allowed by server debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/ubuntu/.ssh/id_rsa (0x7f403e66d570),debug2: key: /home/ubuntu/.ssh/id_dsa (0x7f403e66d4a0),debug2: key: /home/ubuntu/.ssh/id_ecdsa (0x7f403e6724d0),debug2: key: /home/ubuntu/.ssh/id_ed25519 (0x7f403e672b80),debug1: Authentications that can continue: publickey debug3: start over,passed a different list publickey 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/ubuntu/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet,wait for reply debug1: Authentications that can continue: publickey debug1: Offering DSA public key: /home/ubuntu/.ssh/id_dsa debug3: send_pubkey_test debug2: we sent a publickey packet,wait for reply debug1: Authentications that can continue: publickey debug1: Offering ECDSA public key: /home/ubuntu/.ssh/id_ecdsa debug3: send_pubkey_test debug2: we sent a publickey packet,wait for reply debug1: Authentications that can continue: publickey debug1: Offering ED25519 public key: /home/ubuntu/.ssh/id_ed25519 debug3: send_pubkey_test debug2: we sent a publickey packet,wait for reply debug1: Authentications that can continue: publickey debug2: we did not send a packet,disable method debug1: No more authentication methods to try. Permission denied (publickey).
/ etc / ssh / sshd_config文件的内容:
ubuntu@<hostname>:~# cat /etc/ssh/sshd_config # Package generated configuration file # See the sshd_config(5) manpage for details # What ports,IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key HostKey /etc/ssh/ssh_host_ecdsa_key HostKey /etc/ssh/ssh_host_ed25519_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 1024 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 120 PermitRootLogin without-password StrictModes yes RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_kNown_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/kNown_hosts for RhostsRSAAuthentication #IgnoreUserKNownHosts yes # To enable empty passwords,change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords PasswordAuthentication no # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding yes X11displayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server # Set this to 'yes' to enable PAM authentication,account processing,# and session processing. If this is enabled,PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration,# PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication,then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM yes
每次我尝试执行“ssh localhost”时,以下行都会添加到/var/log/auth.log中:
Jan 29 08:40:41 <hostname> sshd[5167]: Connection closed by ::1 [preauth]
有人可以提出任何建议吗?