How to use -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null in Net::SCP::Expect

aneeshk has asked for the wisdom of the Perl Monks concerning the following question:

How can I pass 'StrictHostKeyChecking=no' and 'UserKnownHostsFile=/dev/null' in Net::SCP::Expect. I know how to use any one like below

 my $scpe = Net::SCP::Expect->new( host => $ip, user => "user", passwo
+rd => "password", auto_yes => 1, verbose => 0, option => 'StrictHostK
+eyChecking=no' );
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Re: How to use -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null in Net::SCP::Expect by Corion (Patriarch) on Jun 05, 2015 at 11:22 UTC
Google tells me that this is or was a problem with `openssh`. Maybe this is fixed in later versions. Does the same work when using plain `scp` from the command line?	[reply] [d/l] [select]
Re: How to use -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null in Net::SCP::Expect by salva (Canon) on Jun 05, 2015 at 11:55 UTC
Doing that is a very bad idea!	[reply]
Re^2: How to use -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null in Net::SCP::Expect by jfroebe (Parson) on Jun 05, 2015 at 13:18 UTC
Generally, I would agree with you however there are some scenarios where it makes sense to do so. It isn't ideal but you have to pick your battles. Jason L. Froebe Tech Blog	[reply]
Re^3: How to use -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null in Net::SCP::Expect by salva (Canon) on Jun 05, 2015 at 13:54 UTC
You are right in that sometimes there is no alternative but to just disable host key checking entirely. But in my experience, it is common for people to do that without actually knowing they are ditching the protocol security, just as an easy way to get SSH working.	[reply]