Linux 执行远程命令时出现 SSH 错误：“stdin: is not a tty”
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SSH error when executing a remote command: "stdin: is not a tty"
提问by Jhonathan
I'm trying to connect to machine one with ssh and then connect to another machine two with ssh. But get this error:
我正在尝试使用 ssh 连接到一台机器，然后使用 ssh 连接到另一台机器 2。但是得到这个错误：
ssh [email protected] 'ssh [email protected]'
stdin: is not a tty
采纳答案by Ярослав Рахматуллин
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 inon 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.
登录 shell 时，远程主机假定连接是由人类用户完成的。因此，期望他们能够控制客户端的标准是合理的。也就是说，用户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。
A demonstration of the discussed misbehavior and how to avoid it (man sshand look for -t for a more thorough explanation).
所讨论的不当行为以及如何避免它的演示（man ssh并寻找 -t 以获得更全面的解释）。
$ 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
...and the error:
...和错误：
$ ssh genja.org 'ssh raptor.lan hostname\; uptime'
host: genja.lan
Permission denied (publickey,keyboard-interactive).
You may want to make a tunnel instead:
您可能想要创建一个隧道：
ssh -L 4444:raptor.lan:22 genja.org
Then, on a different terminal:
然后，在不同的终端上：
ssh -p 4444 localhost will give you a conenction straight to "raptor.lan"
Use IP addresses such as 192.168.0.11 if DNS aliases are not configured on the remote end.
如果远端未配置 DNS 别名，请使用 IP 地址，例如 192.168.0.11。
