Question

我正在使用Raspberry Pi 3和Raspbian Stretch Lite。有时当我重新启动rpi时，我无法通过ssh登录。重启后有4种可能的情况：

Connection refused始终出错。
输入密码后PuTTy挂起，不会产生任何错误。
我可以记录，但是在PuTTy中输入任何命令都没有响应。
连接PuTTy时只是黑屏，甚至没有密码提示。

我的/etc/ssh/sshd_config文件只删除了这些行：

PermitRootLogin yes
ChallengeResponseAuthentication no
UsePAM yes
X11Forwarding yes
PrintMotd no
AcceptEnv LANG LC_*
Subsystem       sftp    /usr/lib/openssh/sftp-server

编辑：ssh -v

ssh -v root@10.24.1.52
OpenSSH_7.4p1 Raspbian-10+deb9u1, OpenSSL 1.0.2l  25 May 2017
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to 10.24.1.52 [10.24.1.52] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /root/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.4p1 Raspbian-10+deb9u1

Answer 1

您可以采取一些措施来调试问题。

在客户端使用详细模式（ssh -v / ssh -vv / ssh -vvv）;你似乎已经运用了那个选项
检查服务器端的日志（Raspberry Pi），cat / var / log / auth
检查客户端（运行PuTTy的PC）和服务器（Raspberry Pi）之间的网络连接。有线/无线吗？是否有任何额外的网络设备，如路由器/防火墙？

重启后SSH冻结

1 个答案: