我当时试图设置 Hadoop，却在无密码 ssh 到 localhost 时遇到了麻烦。
当我尝试使用格式连接时，系统提示我输入密码。但是连接到机器（例如或 ）ssh username@hostname没有问题。试过了，但没有用。ssh localhostssh hostname.comssh-copy-id user@hostname
以普通用户身份使用 CentOS 6.3，我既没有 root 访问权限也不是 sudoer，因此无法编辑任何文件（例如 sshd_config）（甚至无法 cat sshd_config 文件内容）。
我希望用户登录是可能的，因为我可以不用密码登录到本地主机，对吗？
请指教，
这是 ssh 调试输出。
[[email protected] ~]$ ssh -v [email protected]
OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to hostname.com [::1] port 22.
debug1: Connection established.
debug1: identity file /home/user/.ssh/identity type -1
debug1: identity file /home/user/.ssh/id_rsa type -1
debug1: identity file /home/user/.ssh/id_dsa type 2
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 'hostname.com' is known and matches the RSA host key.
debug1: Found key in /home/user/.ssh/known_hosts:1
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
debug1: Authentications that can continue: publickey,gssapi-keyex,gssapi-with-mic,password
debug1: Next authentication method: gssapi-keyex
debug1: No valid Key exchange context
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure. Minor code may provide more information
Credentials cache file '/tmp/krb5cc_500' not found
debug1: Unspecified GSS failure. Minor code may provide more information
Credentials cache file '/tmp/krb5cc_500' not found
debug1: Unspecified GSS failure. Minor code may provide more information
debug1: Unspecified GSS failure. Minor code may provide more information
debug1: Next authentication method: publickey
debug1: Offering public key: /home/user/.ssh/id_dsa
debug1: Server accepts key: pkalg ssh-dss blen 434
Agent admitted failure to sign using the key.
debug1: Trying private key: /home/user/.ssh/identity
debug1: Trying private key: /home/user/.ssh/id_rsa
debug1: Next authentication method: password
[email protected]'s password: