简单的分组[]内是组名
mail.example.com[webservers]foo.example.combar.example.com[dbservers]one.example.comtwo.example.comthree.example.com[webservers]www[01:50].example.com[databases]db-[a:f].example.com
mail.example.com
[webservers]
foo.example.com
bar.example.com
[dbservers]
one.example.com
two.example.com
three.example.com
www[01:50].example.com
[databases]
db-[a:f].example.com
分组usa的子组还可以是其它的组,例如[usa:children]中还可以子组southeast, [southeast:children]中还可以包含atlanta和releigh
[atlanta]host1host2[raleigh]host2host3[southeast:children]atlantaraleigh[usa:children]southeastnortheastsouthwestnorthwest
[atlanta]
host1
host2
[raleigh]
host3
[southeast:children]
atlanta
raleigh
[usa:children]
southeast
northeast
southwest
northwest
