linux - ssh inside ssh 具有多个命令

Question

当我尝试多个命令通过其他 ssh 内的 ssh 远程执行命令时，我得到了奇怪的结果。

来自 man ssh:

-t

Force pseudo-terminal allocation. This can be used to execute arbitrary screen-based programs on a remote machine, which can be very useful, e.g. when implementing menu services. Multiple -t options force tty allocation, even if ssh has no local tty.

如果我这样做

ssh -t root@host1 ssh root@host2 "cat /etc/hostname && cat /etc/hostname"

或

ssh -t root@host1 ssh -t root@host2 "cat /etc/hostname && cat /etc/hostname"

在这两种情况下我都得到

host1
Connection to host1 closed.
host2
Connection to host2 closed.

我想要这个结果:

host1
host1
Connection to host1 closed.
Connection to host2 closed.

我想使用 ssh 内的 ssh 在同一服务器中运行所有命令。

如果我只使用一个 ssh，它就可以工作:

ssh -t root@host1 "cat /etc/hostname && cat /etc/hostname"
host1
host1
Connection to host1 closed.

Answer 1

我可以正常工作，但我无法解释发生了什么。

ssh -t root@host1 "ssh -t root@host2 \"cat /etc/hostname ; cat /etc/hostname\""
host1
host1
Connection to host1 closed.
Connection to host2 closed.