To display the alias name

$ dnsdomainname -a

To display all the fully qualified domain names

$ dnsdomainname -A

To set default hostname if none available

$ dnsdomainname -b ilugc

To Displays the short hostname

$ dnsdomainname -s

To display addresses for the host name

$ dnsdomainname -i

To display all addresses for the host

$ dnsdomainname -I

To Displays the Network Information System (NIS) domain name

$ dnsdomainname -y