61

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

1
  • 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, 2014 at 19:08

7 Answers 7

43

Type in terminal.

sudo nmap -sn <Your LAN Subnet>

For Example:

sudo nmap -sn 192.168.1.*

You can find your LAN subnet using ip addr command.

It will show all host name in LAN whether it is Linux or Windows. You also able to see mobile devices, if any present on LAN network. Here you need to make sure that you run command with sudo or root.

7
  • 16
    This shows nothing on my local network that has 30+ Linux machines...
    – Cerin
    Apr 28, 2014 at 16:41
  • @Cerin Are you on Linux machine yourself? Jul 23, 2014 at 3:50
  • 2
    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, 2014 at 21:27
  • 6
    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 Feb 3, 2016 at 16:00
  • 2
    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, 2017 at 14:46
20

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.

4
  • 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, 2014 at 17:11
  • this answer is very fast. Feb 3, 2016 at 1:19
  • 4
    -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, 2016 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, 2019 at 21:26
12

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
3
  • This is the answer which worked for me
    – humphrey
    Aug 21, 2017 at 13:07
  • That's THE answer.
    – Campa
    Jan 8, 2018 at 14:42
  • my *ux do not have that command... ?what distro are you using??
    – ZEE
    Jun 17, 2021 at 16:58
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

8
  • 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. Apr 27, 2012 at 20:55
  • 2
    can you try nmblookup? it should be installed already on Ubuntu
    – Brett
    Apr 27, 2012 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? Apr 27, 2012 at 21:04
  • 6
    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, 2012 at 21:19
  • 1
    @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, 2015 at 3:40
5

I'd just use

nslookup xxx.xxx.xxx.xxx

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

3
  • 6
    This just gets me ** server can't find xxx.xxx.xxx.xxx.in-addr.arpa.: NXDOMAIN
    – Cerin
    Apr 28, 2014 at 16:50
  • works for me :) Jun 15, 2015 at 7:57
  • 3
    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. Jun 9, 2016 at 10:16
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.

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.

3
  • Could you name a program please? Apr 27, 2012 at 20:45
  • 1
    The OP wants the opposite. e.g. IP->hostname
    – Cerin
    Apr 28, 2014 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, 2014 at 13:44

Not the answer you're looking for? Browse other questions tagged or ask your own question.