执行远程命令时出现 SSH 错误:“stdin: is not a tty" [英] SSH error when executing a remote command: "stdin: is not a tty"

问题描述

我正在尝试使用 ssh 连接到机器一，然后使用 ssh 连接到另一台机器.但是得到这个错误:

I'm trying to connect to machine one with ssh and then connect to another machine two with ssh. But get this error:

ssh [e-mail] 'ssh [e-mail]'

stdin: is not a tty

推荐答案

登录到 shell 时，远程主机假定连接是由人类用户完成的.因此，有理由期望他们可以控制客户端上的标准.也就是说，用户正在通过键盘在终端上进行输入.如果远程主机检测到用户不是人类(因为输入的不是终端 - tty，而是另一个进程)，它可能会警告用户这种意外情况.

When logging into a shell, the remote host assumes that the connection is done by a human user. Therefore, it is reasonable to expect that they have control over the standard in on the client. That is to say, the user is giving input on a terminal through the keyboard. If the remote host detects that the user is not human (because the input is not a terminal - tty, but another process), it may warn the user about this unexpected condition.

所讨论的不当行为的演示以及如何避免它(man ssh 并查找 -t 以获得更全面的解释).

A demonstration of the discussed misbehavior and how to avoid it (man ssh and look for -t for a more thorough explanation).

$ ssh -t genja.org 'ssh raptor.lan hostname; uptime'
host: genja.lan 
raptor
 21:17:27 up 3 days, 15 min,  1 user,  load average: 0.00, 0.00, 0.00
Connection to genja.org closed.

$ ssh genja.org uptime 
host: genja.lan 
 21:17:43 up 12 days, 17:40,  1 user,  load average: 0.30, 0.08, 0.02

...和错误:

$ ssh  genja.org 'ssh raptor.lan hostname; uptime'
host: genja.lan 
Permission denied (publickey,keyboard-interactive).

<小时>

你可能想建立一个隧道:

---

You may want to make a tunnel instead:

ssh -L 4444:raptor.lan:22 genja.org

然后，在不同的终端上:

Then, on a different terminal:

ssh -p 4444 localhost will give you a conenction straight to "raptor.lan"

如果远端没有配置 DNS 别名，则使用 IP 地址，例如 192.168.0.11.

Use IP addresses such as 192.168.0.11 if DNS aliases are not configured on the remote end.

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