How to realize automatic login of ssh expect

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Implementation: ssh remote login, each time to specify a bunch of user names and passwords, now requires automatic login.

Login process: local A first logs in to B and then B logs in to the final C

The code is as follows:

#! / usr/bin/expect-f

Set timeout 30

Spawn ssh B

Expect "password:"

Send "passwd@\ r"

Expect "] *"

Send "ssh name@C-p port\ r"

Expect "password:"

Send "passwd\ r"

Interact

To run Expect on a system, you must first install Tcl

# apt-get install expect

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