55

My network includes machines running Linux and others running Windows. And my machine is running Linux.

  • 2
    The question is a bit unclear, which resulted in the varying - and good - answers below. Do you want to find the DNS name of a host? Do you want to find the WINS name? Do you want to search the network for all hosts found? All of these questions are answered - but the specific answer desired is unknown. – Mei Sep 29 '14 at 19:08
37

Type in terminal

arp -a

It will show all host name in LAN whether it is Linux or Windows.

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  • 15
    This shows nothing on my local network that has 30+ Linux machines... – Cerin Apr 28 '14 at 16:41
  • @Cerin Are you on Linux machine yourself? – Shashank Sawant Jul 23 '14 at 3:50
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    On Ubuntu 14.04 this says: "? (192.168.1.2) at 00:22:6b:f2:33:b3 [ether] on wlan0", giving me only info about my router (my laptop is connected to it via wifi, like about other 10 devices atm). Looking at man arp it says also "arp - manipulate the system ARP cache". How should this tool solve the original question? – gerlos Dec 25 '14 at 21:27
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    Same here on Ubuntu 14.04, this just lists a bunch of ? (192.168.55.147) at ac:3a:7a:a4:01:d4 [ether] on eth0 – Elijah Lynn Feb 3 '16 at 16:00
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    Same here. I can only access the localhost by hostname, nothing else seems to advertise it's hostname, even linux machines I have set up myself. – unfa Oct 27 '17 at 14:46
19

Type in terminal

sudo aptitude install nmap
nmap -sP xxx.xxx.xxx.xxx

This will give you:

Starting Nmap 5.21 ( http://nmap.org ) at 2012-11-03 19:08 CET
Nmap scan report for HOST.DOMAIN (xxx.xxx.xxx.xxx)
Host is up (0.00052s latency).
MAC Address: YY:YY:YY:YY:YY:YY (Manufactor)
Nmap done: 1 IP address (1 host up) scanned in 0.11 seconds

Where HOST.DOMAIN is the DNS-name of the machine.

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  • 10
    This shows all active IPs, but it only shows domains for machines which explicitly have custom domain configured in my local Bind server. It doesn't show any local hostnames, which I think is what the OP is trying to accomplish. – Cerin Apr 28 '14 at 17:11
  • this answer is very fast. – activedecay Feb 3 '16 at 1:19
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    -sP may have been changed to -sn depending on your version of nmap. From the nmap 7.12 manual: -sn (No port scan) In previous releases of Nmap, -sn was known as -sP. – Lemmings19 Nov 15 '16 at 21:37
  • Similar to the arp command, I believe this answer only works if you have a local DHCP server and DNS server/proxy that communicate with one another, so that the hostnames recorded with the DHCP leases can be resolved (or reverse-resolved, in this case) via DNS. – Doktor J Sep 25 '19 at 21:26
9

What if you try this:

You can run it in windows

nbtstat -A xxx.xxx.xxx.xxx (where x is the ip address)

on ubuntu you can install nbtscan. You can find more information here : http://www.unixwiz.net/tools/nbtscan.html

Hope it helps

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  • Thanks very much, but it seems that nbtscan detects machines running Windows only. I've 2 machines running Windows and another 2 running Linux. It detects the two running Windows only. – Islam Hassan Apr 27 '12 at 20:55
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    can you try nmblookup? it should be installed already on Ubuntu – Brett Apr 27 '12 at 20:57
  • Sorry, I've read the tutorial but couldn't figure out how to write the command that solves my problem. I can't see options taking IP as input. Can you write the command for me please? – Islam Hassan Apr 27 '12 at 21:04
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    try nmblookup -A xxx.xxx.x.x where x is the ip address of the machine. So I would do nmblookup -A 192.168.1.6 and it would return the name of my machine. You will need to do that for each machine. – Brett Apr 27 '12 at 21:19
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    @Brett: (+1) you should convert your comment into an answer, as its the only method that worked for me (both windows and linux boxes). Thanks – lepe Jun 30 '15 at 3:40
8

A Netbios name reverse lookup might accomplish what you want more than than "hostname" which is a function of DNS and tcp/ip. nmblookup with the -A parameter returns device names as well as mac address. Try something like this:

nmblookup -A 192.168.1.2
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  • This is the answer which worked for me – humphrey Aug 21 '17 at 13:07
  • That's THE answer. – Campa Jan 8 '18 at 14:42
3

If your network is running a DHCP server, usually on the modem/router, chances are it will have a way for you to see the DHCP assigned addresses - often by a web page, and that often lists the computer names beside the allocated ip addresses.

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2

I'd just use

nslookup xxx.xxx.xxx.xxx

it will show me the host name (usually the computer name)

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  • 4
    This just gets me ** server can't find xxx.xxx.xxx.xxx.in-addr.arpa.: NXDOMAIN – Cerin Apr 28 '14 at 16:50
  • works for me :) – vk.edward.li Jun 15 '15 at 7:57
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    nslookup does DNS searches, so for this to work you need the hosts to be registered in the DNS. If you have a regular Windows network, in a private IP range, without ActiveDirectory configured, it will not work. NetBios names, and DNS names are different beasts. – bogdan.mustiata Jun 9 '16 at 10:16
1

To the best of my knowledge, there is no utility available to resolve an IP address into a NetBIOS name. I'd imagine that some sort of a network scoping program or a penetration testing program might be able to give you that sore of information though. However, all of the computers would have to be on the same domain and subnet.

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  • Could you name a program please? – Islam Hassan Apr 27 '12 at 20:45
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    The OP wants the opposite. e.g. IP->hostname – Cerin Apr 28 '14 at 16:48
  • I know this is old...and OP is using Linux, not Windows...but on Windows you can run nbtstat -A <IP Address> to get the NetBIOS name from just the IP. This works across subnets and there's no need to be in the same domain. Also, running nbtstat -a <NetBIOS Name> will do the reverse. Hope this helps... – John Homer Sep 10 '14 at 13:44

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