hosts

[server]
192.168.0.103

# under sample

#192.168.0.103:22
#192.168.0.103 ansible_ssh_port=22
#192.168.0.103 ansible_ssh_private_key_file=~/.ssh/id_rsa
#test ansible_ssh_host=192.168.0.103
#192.168.0.103 ansible_ssh_user=root
#jumper ansible_ssh_port=22 ansible_ssh_host=192.168.0.103

#[sample]
#(comment) www1.example.com to www99.example.com
#www[1:99].example.com

#(comment)  www01.example.com to www99.example.com
#www[01:99].example.com

#(comment)  db-a.example.com to db-z.example.com
#db-[a:z].example.com

#(comment)  db-A.example.com to db-Z.example.com
#db-[A:Z].example.com

#[databases]
#192.168.0.103

#(comment)  Multi Group. use server & databases
#[group:children]
#sample
#databases