https://docs.ansible.com/ansible/latest/installation_guide/intro_installation.html#installing-ansible-on-ubuntu
添加主机，例如192.168.1.184
/etc/ansible/hosts
ansible all --list
ansible 192.168.1.184 -m ping -u ripple -k
如果想省略-k的话
ssh-keygen
ssh-copy-id ripple@192.168.1.184
