Provided by: inetutils-tools_2.5-5ubuntu1_amd64 bug

NAME
     dnsdomainname — show DNS domain name


SYNOPSIS
     dnsdomainname [option ...]


DESCRIPTION
     Show the domain part of the system's fully qualified host name.

     The tool uses gethostname(2) to get the host name of the system and getaddrinfo(2) to
     resolve it into a canonical name.  The part after the first period (‘.’) of the canonical
     name is shown.


OPTIONS
     -?, --help
             Give this help list.

     --usage
             Give a short usage message.

     -V, --version
             Print program version.


SEE ALSO
     gethostname(2), getaddrinfo(3)