Can you help me on how to deal with the above prompt for the first time when we attempt to connect to the device?

The easy solution is to set strict_host_key_checking => 0 in the Net::SSH::Any constructor. This is of course very insecure but since your previous posts on the subject suggest that security is a very low priority for you then this may be sufficient.

i already tried strict_host_key_checking => 0 in the past, for few devices SSH connection was not happening. i was getting error message that "channel not identified". This was because of using the option strict_host_key_checking => 0. Hence i decided not to use it

Those are unrelated things. You were probably doing something else wrong.

But we all know that when we do SSH for the first time, we get the following prompt =

The authenticity of host '10.3.170.37 (10.3.170.37)' can't be established. ECDSA key fingerprint is 4f:2e:c4:f1:d7:f6:9a:07:c5:62:17:00:0d:1d:77:26. Are you sure you want to continue connecting (yes/no)?

Connect once manually, and the prompt will disappear. ssh stores the remote host's key in $HOME/.ssh/known_hosts when you first connect to a remote host. This is a quite simple file, using one line per host. You could also copy lines from one system to another to get rid of the prompt. There is also a system-wide known_hosts file /etc/ssh/ssh_known_hosts. See also https://en.wikibooks.org/wiki/OpenSSH/Client_Configuration_Files.

Alexander

You advice of

Connect once manually

vs the requirement of

connect to 1000 devices

could be a problem...

The SSH protocol supports many authentication methods. Arguably one the most important of these is public key authentication for interactive and automated connections.

Hello vasanth.easyrider,

I have never tried it for new ssh sessions but it should work. Try to use Expect.

Pseudo code bellow:

#!/usr/bin/perl
use Expect;
use strict;
use warnings;

# create an Expect object by spawning another process
my $exp = Expect->spawn($command, @params);
$exp->send("yes");
[download]

Hope this helps, BR.