Expect + telnet problem

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Hello,

I'm creating an expect script to:

telnet router
execute command
exit

This seems to be quite easy when you have 1 router, the problem is I have a list of 40 routers, so I thought about creating a expect script but I have gotten some problems.
The first one is...how to include all the machines?
I thought about something like: for d in $(cat router_list); do expect_script $d;done

And if that worked, the script would take $d and do:

telnet $d
execute my command
exit

But I don't know how to accomplish that as the script and the "expect --exact" output are different, one per router, basically because:
expect -exact "telnet router23\r
Trying 192.168.33.12...\r
Connected to router23.test.\r

Changes in all the routers, I have tried to delete that whole paragraph so it only expects "Login", but it doesn't work.

And also...how to include the script in the "for" loop?.

Any idea will be appreciated.

Arthur.



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