我不知道这是如何发生的。发行版是 Scientific Linux 6.1，一切都设置为通过公钥执行身份验证。然而，当 sshd 作为守护进程运行时（service sshd start），它不接受公钥。（为了获取这段日志，我已经更改了 sshd 脚本以添加 -ddd 选项）
debug1: trying public key file /root/.ssh/authorized_keys
debug1: restore_uid: 0/0
debug1: temporarily_use_uid: 0/0 (e=0/0)
debug1: trying public key file /root/.ssh/authorized_keys2
debug1: restore_uid: 0/0
Failed publickey for root from xxx.xxx.xxx.xxx port xxxxx ssh2
debug3: mm_answer_keyallowed: key 0x7f266e1a8840 is not allowed
debug3: mm_request_send entering: type 22
debug3: mm_request_receive entering
debug2: userauth_pubkey: authenticated 0 pkalg ssh-rsa
debug3: Wrote 64 bytes for a total of 1853
debug1: userauth-request for user root service ssh-connection …