Linux
無法使用公鑰對登錄（ssh）
我無法使用公鑰對登錄。我確實可以使用密碼訪問。以下是伺服器端和客戶端的日誌。為什麼我無法登錄？
type=CRYPTO_KEY_USER msg=audit(1481731455.027:102046): user pid=8859 uid=0 auid=0 ses=6158 msg='op=destroy kind=session fp=? direction=both spid=8860 suid=74 rport=59031 laddr=XX.XXX.XX.XXX lport=22 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success' type=USER_ERR msg=audit(1481731455.028:102047): user pid=8859 uid=0 auid=0 ses=6158 msg='op=PAM:bad_ident acct="?" exe="/usr/sbin/sshd" hostname=YY.YYY.YY.YYY addr=YY.YYY.YY.YYY terminal=ssh res=failed' type=CRYPTO_KEY_USER msg=audit(1481731455.028:102048): user pid=8859 uid=0 auid=0 ses=6158 msg='op=destroy kind=server fp=6f:21:ce:5c:81:10:5e:63:db:32:54:71:80:bf:99:97 direction=? spid=8859 suid=0 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success' type=CRYPTO_KEY_USER msg=audit(1481731455.028:102049): user pid=8859 uid=0 auid=0 ses=6158 msg='op=destroy kind=server fp=d7:a6:59:60:99:86:45:95:69:79:bf:ea:8a:fa:0a:46 direction=? spid=8859 suid=0 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success' type=USER_LOGIN msg=audit(1481731455.028:102050): user pid=8859 uid=0 auid=0 ses=6158 msg='op=login acct="user" exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=ssh res=failed' type=CRYPTO_KEY_USER msg=audit(1481731455.707:102051): user pid=8862 uid=0 auid=0 ses=6158 msg='op=destroy kind=server fp=6f:21:ce:5c:81:10:5e:63:db:32:54:71:80:bf:99:97 direction=? spid=8862 suid=0 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success' type=CRYPTO_KEY_USER msg=audit(1481731455.707:102052): user pid=8862 uid=0 auid=0 ses=6158 msg='op=destroy kind=server fp=d7:a6:59:60:99:86:45:95:69:79:bf:ea:8a:fa:0a:46 direction=? spid=8862 suid=0 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success' type=CRYPTO_SESSION msg=audit(1481731455.708:102053): user pid=8861 uid=0 auid=0 ses=6158 msg='op=start direction=from-client cipher=aes128-ctr ksize=128 spid=8862 suid=74 rport=59032 laddr=XX.XXX.XX.XXX lport=22 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success' type=CRYPTO_SESSION msg=audit(1481731455.708:102054): user pid=8861 uid=0 auid=0 ses=6158 msg='op=start direction=from-server cipher=aes128-ctr ksize=128 spid=8862 suid=74 rport=59032 laddr=XX.XXX.XX.XXX lport=22 exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=? res=success' type=USER_AUTH msg=audit(1481731455.764:102055): user pid=8861 uid=0 auid=0 ses=6158 msg='op=pubkey acct="user" exe="/usr/sbin/sshd" hostname=? addr=YY.YYY.YY.YYY terminal=ssh res=failed'以下是客戶端的日誌
OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013 debug1: Reading configuration data /home/user/.ssh/config debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug1: Connecting to XX.XXX.XX.XXX [XX.XXX.XX.XXX] port 22. debug1: Connection established. debug1: identity file /home/user/.ssh/identity type -1 debug1: identity file /home/user/.ssh/identity-cert type -1 debug1: identity file /home/user/.ssh/id_rsa type 1 debug1: identity file /home/user/.ssh/id_rsa-cert type -1 debug1: identity file /home/user/.ssh/id_dsa type -1 debug1: identity file /home/user/.ssh/id_dsa-cert type -1 debug1: identity file /home/user/.ssh/id_ecdsa type -1 debug1: identity file /home/user/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3 debug1: match: OpenSSH_5.3 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.3 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: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug1: Host 'XX.XXX.XX.XXX' is known and matches the RSA host key. debug1: Found key in /home/user/.ssh/known_hosts:6 debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ + ===================== + + !!! C A U T I O N !!! + + ===================== + + + + This system is for the use of authorized users only. + + Individuals using this computer system without authority, or in + + excess of their authority, are subject to having all of their + + activities on this system monitored and recorded by system + + personnel. + + In the course of monitoring individuals improperly using this + + system, or in the course of system maintenance, the activitie + + of authorized users may also be monitored. + + Anyone using this system expressly consents to such monitoring + + and is advised that if such monitoring reveals possible + + evidence of criminal activity, system personnel may provide the + + evidence of such monitoring to law enforcement officials. + + + +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ debug1: Authentications that can continue: publickey,password debug1: Next authentication method: publickey debug1: Trying private key: /home/user/.ssh/identity debug1: Offering public key: /home/user/.ssh/id_rsa debug1: Authentications that can continue: publickey,password debug1: Trying private key: /home/user/.ssh/id_dsa debug1: Trying private key: /home/user/.ssh/id_ecdsa debug1: Next authentication method: password user@XX.XXX.XX.XXX's password:可能是什麼原因？不過，我無法從伺服器日誌中獲得太多收益。
在讀取目標主機上的公鑰時，ssh 對目錄和文件的權限非常挑剔。檢查您嘗試登錄的框的以下權限：
- 您的主目錄
~/應具有 755 (rwxr-xr-x) 或更少的權限- 您的
~/.ssh目錄還應具有 755 (rwxr-xr-x) 或更少的權限- 您的
~/.ssh/authorized_keysor~/.ssh/authorized_keys2文件應具有 644 (rw-r–r–) 或更少的權限。當然，您也可能在目標的 authorized_keys 文件中沒有正確的公鑰。用於
ssh-copy-id將密鑰複製到目的地，如下所示：ssh-copy-id server.example.com替換
server.example.com為目標伺服器的主機名。它應該提示您輸入密碼，然後複製您的密鑰。