Ansible operating instructions for configuring SSH authentication free for the first time

When the host logs in remotely , For the first time, there are certification prompts , Here's the picture ：

 

If the number of hosts is large, the following methods can be used ：

    Method 1 ： open /etc/ansible/ansible.cfg , Modify the following configuration items

host_key_checking = False

    Method 2 ： open /etc/ssh/ssh_config, Modify the following configuration items

# StrictHostKeyChecking ask

StrictHostKeyChecking no  # Modify to this item 

  Method 3 ： Execute the following command

echo "export ANSIBLE_HOST_KEY_CHECKING=False" | sudo tee -a /etc/profile

source /etc/profile