How to avoid host key checking during ansible script execution

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During execution of ansible playbook or ansible script on new remote host (which you have not connected via ssh so far) the script might fail with below error

 UNREACHABLE! => {"changed": false, "msg": "Failed to connect to the host via ssh: ----}

To avoid this you can set the environment variable (ANSIBLE_HOST_KEY_CHECKING) to disable host check before ssh during ansible script execution.

 export ANSIBLE_HOST_KEY_CHECKING=False

Now you can execute the ansible script.

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