I'm in an Active Directory domain.

I have a windows computer (not joined to the domain). When I connect it to the network, I can ping it by hostname from any other computer on the network.

How can I replicate this behavior on Lubuntu 16.04?

I've tried samba/winbind. I got somewhere with avahi, but that doesn't appear to work across different subnets.

If my unjoined windows computer can do it so effortlessly, then there HAS to be a way with Ubuntu. Please help.

  • Typically the DHCP server will register the FQDN in DNS for the host. The client has to send the host name option in the DHCP request ttho.
    – vidarlo
    Dec 29, 2017 at 13:10
  • OK, so then I need to tinker around with /etc/dhcp/dhclient.conf, then, @vidarlo? Dec 29, 2017 at 13:32
  • I would guess so, but I'd not be surprised if ad does it some totally different way...
    – vidarlo
    Dec 29, 2017 at 13:42
  • Check out my answer below @Vidarlo Dec 29, 2017 at 13:56

2 Answers 2


Thank you to @Vidarlo.

I went back to my dhclient.conf file (/etc/dhcp/dhclient.conf), where I had tried submitting the fqdn already, but I admittedly cut and pasted code I saw from other discussion forums. I had the following,

send fqdn.fqdn "myhost.my.corp.domain";
send fqdn.encoded on;
send fqdn.server-update off;

but the send fqdn.server-update should have been set to on.

Then, to release your lease with the DHCP server and get a new lease run the following commands:

sudo dhclient -r
sudo dhclient

And now it works!

  • 1
    Will this work with home routers? They have built in DHCP and tell clients that the router is the dns server? But are they real DNS servers or just DNS repeaters?
    – RoboJ1M
    Sep 19, 2018 at 20:39
  • 1
    For completeness to help other people trying to solve this problem, it would be helpful to note the location of the dhclient.conf file: /etc/dhcp/dhclient.conf on 16.04
    – reads0520
    Jan 10, 2019 at 18:43
  • The path that I mentioned in my comment on the question? Jan 11, 2019 at 12:26

Very simple and elegant solution for using SSSD based integration - https://blogs.technet.microsoft.com/jeffbutte/2016/12/18/265/ - just set FQDN as linux hostname:

hostnamectl examplename.mydomain.mysuffix

actually set-hostname is missing, it should read:

hostnamectl set-hostname examplename.mydomain.mysuffix

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