Man1 - dnsdomainname.1

dnsdomainname - show DNS domain name

dnsdomainname [/OPTION/…]

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

The tool uses gethostname to get the host name of the system and getaddrinfo 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

Written by Simon Josefsson.

Report bugs to <bug-inetutils@gnu.org>.

Copyright © 2021 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later https://gnu.org/licenses/gpl.html.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.

gethostname(2), getaddrinfo(3)

The full documentation for dnsdomainname is maintained as a Texinfo manual. If the info and dnsdomainname programs are properly installed at your site, the command

info dnsdomainname

should give you access to the complete manual.