Provided by: inetutils-tools_1.9.4-8_amd64
dnsdomainname — show DNS domain name
dnsdomainname [option ...]
Show 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.
-?, --help Give this help list. --usage Give a short usage message. -V, --version Print program version.