When automating a task, there's nothing more annoying than an "are you sure?"-question popping up.

If you want to automate an ssh connection, chances are this is the first time you're connecting to your target. Thus, you'll be presented with the following message:

$ ssh example.com
The authenticity of host 'example.com (...)' can't be established.
RSA key fingerprint is SHA256:P2VbGDRAAaPQTaBovKynIccHxse4aXNH0ZgGLyVTzQL.
Are you sure you want to continue connecting (yes/no/[fingerprint])?

This check can be turned off with the StrictHostKeyChecking option:

$ ssh -o StrictHostKeyChecking=no example.com

Caution: This is a security check to mitigate different attacks. Only turn this feature off if you understand the risks.