1.指定单台机器:

[root@ansible-server ~]# ansible ansible-web1 -m ping -o


2.同时指定多台机器:

[root@ansible-server ~]# ansible ansible-web1,ansible-web2 -m ping -o


3.指定组名:  

[root@ansible-server ~]# ansible  webservers1 -m ping -o