Linux see all devices on network

How to Find What Devices are Connected to Network in Linux

Look for a link or button named something like “attached devices,” “connected devices,” or “DHCP clients.” You may find this on the Wi-Fi configuration page, or you may find it on some sort of status page. On some routers, the list of connected devices may be printed on a main status page to save you some clicks.

How do I find my network device name in Linux?

1. IPv4. You can get a list of the network interfaces and IPv4 addresses on your server by running the following command: /sbin/ip -4 -o a | cut -d ‘ ‘ -f 2,7 | cut -d ‘/’ -f 1. .
2. IPv6. For IPv6, you can run a similar command but use “-6” in place of “-4”: /sbin/ip -6 -o a | cut -d ‘ ‘ -f 2,7 | cut -d ‘/’ -f 1. .
3. Full output.

How do I see what devices are on my network using nmap?

1. Step 1: Open the Ubuntu command line. .
2. Step 2: Install the network scanning tool Nmap. .
3. Step 3: Get the IP range/subnet mask of your network. .
4. Step 4: Scan network for connected device(s) with Nmap. .
5. Step 5: Exit the Terminal.

How do I identify an unknown device on my network?

1. On your keyboard, press the Windows. .
2. Choose Network & Internet.
3. For wireless connections, click Wi-Fi. .
4. Select your network connection.

Can I see what others are doing on my network?

1. WireShark. Wireshark is a popular packet capturing tool, design especially to see what people are browsing on a network in real-time. Once you start the software, it shows the IP address of all the devices on your network.

Can someone see my Internet history if I use their WiFi?

A WiFi owner can see what websites you visit while using WiFi as well as the things that you search on the Internet. . When deployed, such a router will track your browsing activities and log your search history so that a WiFi owner could easily check what websites you were visiting on a wireless connection.

How do I find my network card in Linux?

1. lspci command : List all PCI devices.
2. lshw command : List all hardware.
3. dmidecode command : List all hardware data from BIOS.
4. ifconfig command : Outdated network config utility.
5. ip command : Recommended new network config utility.
6. hwinfo command : Probe Linux for network cards.

Where is the WIFI interface in Linux?

1. Open a Terminal window, type lshw -C network and press Enter . .
2. Look through the information that appeared and find the Wireless interface section. .
3. If a wireless device is listed, continue on to the Device Drivers step.

How do I find network information in Linux?

The command for finding your IP Address is ifconfig. When you issue this command you will receive information for every network connection you have available. Most likely you will see information for both the loopback (lo) and your wired network connection (eth0).

What are Nmap commands?

• Ping Scanning. As mentioned above, a ping scan returns information on every active IP on your network. .
• Port Scanning. There are several ways to execute port scanning using Nmap. .
• Host Scanning. .
• OS Scanning. .
• Scan The Most Popular Ports. .
• Output to a File. .
• Disable DNS Name Resolution.

How many devices are connected to my wifi router terminal?

Open Command Prompt, type ipconfig, and press Enter. As you can see in the screenshot below, when you run this command, Windows displays the list of all the active network devices, whether they’re connected or disconnected, and their IP addresses.

Dnsmasq

Step 1: Install Dnsmasq on Ubuntu 20.04|18.04. Ubuntu 18.04+ comes with systemd-resolve which you need to disable since it binds to port 53 which will.

Lsof

lsof meaning ‘LiSt Open Files’ is used to find out which files are open by which process. As we all know Linux/Unix considers everything as a files (p.

Sqlite

Restore an SQLite DatabaseThe . restore Command. The . . Attach the Database. Another way to restore a backup file is to simply attach it directly. .

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Find All the Connected Devices on Your Network in Linux

Want to know what other or how many devices are connected to your network? Here in this tutorial, I will show you how you can easily find who is connected to your network. And not only their IPs, but you can get some other information such as their MAC address, opened ports on their devices and OS info as well.

By scanning your network, you can assure that only people who are supposed to be on the network are connected and there are no bandwidth hogs and potential threats on your network, lets get started. For this tutorial, we will be using nmap.

What is Nmap?

Network Mapper or nmap as it is commonly known is a free and opensource network scanning utility that lets you find devices connected on a specified network and their details such as their assigned IP on the network, open ports, OS details, and more.

Installing Nmap

Nmap is available in the default repositories in most of the Linux distributions, you should not have any trouble installing it. It can easily be installed by typing a simple command in the terminal.

For Ubuntu/Debian based distributions, type:

Arch Linux (& Artix, Manjaro, etc.):

Once nmap is installed, the next thing that we need to do is to find the local IP range of our network.

In Linux we can use the ip command to do so, this command will let us find our private/local IP address which we can use to find the range.

Open a terminal window and type:

The output will be something like this:

[[email protected] ~]$ ip a 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp2s0: mtu 1500 qdisc fq_codel state DOWN group default qlen 1000 link/ether 88:51:fb:4c:4f:8f brd ff:ff:ff:ff:ff:ff 3: wlp0s18f2u1: mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 20:e2:16:00:bc:ca brd ff:ff:ff:ff:ff:ff inet 192.168.43.111/24 brd 192.168.43.255 scope global dynamic noprefixroute wlp0s18f2u1 valid_lft 2354sec preferred_lft 2354sec inet6 2401:4900:30b5:84b:6e30:5e8a:1ffa:54fc/64 scope global noprefixroute valid_lft forever preferred_lft forever inet6 fe80::939c:1c17:8695:9db1/64 scope link noprefixroute valid_lft forever preferred_lft forever 

In this line, you can see that:

inet 192.168.43.111/24 brd 192.168.43.255 scope global dynamic noprefixroute wlp0s18f2u1

I am connected to wifi using the device wlp0s18f2u1, and my ip address is 192.168.43.111 .

It also states that wifi router’s broadcast (brd) address is 192.168.43.255 .

Meaning my network can assign new devices IP from the range 192,168.43.0 – 192.168.43.225 .

Scanning Network Using Nmap

Now we have our IP range, we can begin the scan. To do the scan we need access to a terminal (scroll down for the GUI method), most mainstream Linux distributions come with one these days.

On Ubuntu you will find gnome-terminal, on KDE desktop environment there is Konsole, for XFCE there is xfce-terminal and so on. You can also use a tty or an ssh client.

[[email protected] ~]$ nmap -T4 192.168.43.0/24 Starting Nmap 7.80 ( https://nmap.org ) at 2020-09-03 22:45 IST Nmap scan report for sakura (192.168.43.17) Host is up (0.0057s latency). All 1000 scanned ports on sakura (192.168.43.17) are closed Nmap scan report for ServerR-c (192.168.43.111) Host is up (0.00022s latency). Not shown: 999 closed ports PORT STATE SERVICE 22/tcp open ssh Nmap done: 256 IP addresses (2 hosts up) scanned in 17.90 seconds 

Here you can see that nmap has found 3 devices on my network. The ServerR-c (192.168.43.111) is my main computer that I am writing this tutorial from and sakura (192.168.43.17) is my laptop that is connected on the same network as my main PC.

Nmap has detected both devices who are connected on my network successfully, lets try the Operating System Detection feature as well.

Note: OS detection in nmap requires root privileges, you will need to run nmap with sudo.

sudo nmap -T4 -O 192.168.43.0/24

While nmap is having trouble here with the Linux version of Device (Linux 2.6 xD), it has successfully detected the Operating system (Linux) of my PC (ServerR-c) and interestingly, this time it has also picked my phone that I am using as the wifi hotspot.

Scanning for Open Ports

When you run a normal scan, nmap automatically scans for open ports as well. If a host on the network has open port, it will list it.

PORT STATE SERVICE 22/tcp open ssh

If you want to search for a single port, or for ports in a specific range, you can do that as well in nmap. Use these commands as an example.

The above command will search for port 22 (default ssh port) on the IP range 192.168.43.0 – 225.

nmap -T4 -p15-777 192.168.43.0/24

This command will search for port 15 to port 777 on the IP range 192.168.43.0 – 225.

There you go, this was for the nmap cli software now lets move on to the GUI. It is similar to the CLI nmap but just has some extra bells and whistles.

Using Zenmap (Nmap GUI)

Zenmap is the official GUI for Nmap. To find devices on the network using zenmap install the package and run it as root (recommended as some features does not work unless you run it with elevated privileges.)

Now get the local ip address of your system using the command ip a , then replace the numbers after the final dot to 0/24 , paster it in the target box and hit scan.

For example, if you ip address is 192.168.43.111 , then in the zenmap’s target box type: 192.168.43.0/24 .

If you want to find addition information about host devices, you can use the filters/profiles. For example using the filter Quick Scan Plus, you can find info about the host’s operating system and device details.

GUI applications are good for beginners and for people who are not very familiar with CLI (Command Line Interface). But in the case of nmap, I would recommend that you use the command line as it is very easy to perform a simple scan using a terminal.

The reason is that zenmap is not available in the base (default) repositories of many Linux Distributions; and the only binary that nmap’s website provides for Linux is in rpm format (rpm is for RHEL, CentOS, Fedora, etc.). So you are left with the option to compile the program from its source.

However, if you are using any Arch Linux Based Linux OS and have access to aur, you can grab the zenmap package with the help of your favorite aur helper.

Conclusion

This concludes this tutorial, I hope you were able to find what you were looking for, especially that pesky little one on your network causing you problems.

I have tried my best to simplify the process for you but if you still didn’t get something you can ask for it in the comments down below. And as always, any suggestion, feedback or comment on this post is welcome.

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