Linux find device on network

How to find Devices connected to your Network using Debian Linux

How can I see all devices connected to my network in Linux?

1. Step 1: Install nmap. nmap is one of the most popular network scanning tool in Linux. .
2. Step 2: Get IP range of the network. Now we need to know the IP address range of the network. .
3. Step 3: Scan to find devices connected to your network.

How do I find all devices connected to my network?

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.

What does 24 mean on IP address?

2.0/24”, the number “24” refers to how many bits are contained in the network. From this, the number of bits left for address space can be calculated. As all IPv4 networks have 32 bits, and each “section” of the address denoted by the decimal points contains eight bits, “192.0.

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.

How do I find out what devices are connected to my phone?

How To Check Which Devices Are Using Your Google Account. Go To Google’s Devices Dashboard – Make sure that you’re signed in to the right Google account and then head on over to Google’s Devices & Activity page.

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).

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.

How do I find network drivers in Linux?

1. The above command indicates that my Ethernet is up and running with 192.168. 2.24/24 IP address. It also displayed my mac address 40:9f:38:28:f6:b5.
2. Run: sudo ethtool -i eno1.
3. Run wavemon command to find out Wireless network speed, signal Strength and other information from the CLI: wavemon.

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.

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.

What is my IP on local network?

Tap on the gear icon to the right of the wireless network you’re connected to, and then tap on Advanced toward the bottom of the next screen. Scroll down a bit, and you’ll see your device’s IPv4 address.

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How to find Devices connected to your Network using Debian Linux

Sometimes you need to find out which devices are connected to your network. There can be several reasons for this. Maybe your Internet is running slower than usual, you notice suspicious activity that suggests someone is stealing your Wi-Fi, or you’re troubleshooting a problem. Whatever the reason, it’s a good idea to check who else is connected to your network so that appropriate action can be taken.

Nmap is a great tool to help you find devices connected to your network. It’s an open-source network discovery tool that lets you find out what other systems are on your network, what IP addresses they have, what services they offer, what operating system version they’re using, and more. It runs on almost all major operating systems, including Linux, Windows, and Mac OS.

In this article, we describe how to install and use Nmap to find devices connected to your Internet.

We use Debian 11 to explain the procedure described in this article. You can also use the same procedure for older versions of Debian.

Step 1: Open the Debian Terminal

Launch the Terminal application in your system by going into the Activities tab in the top left corner of your Debian desktop. Then in the search bar, type terminal. When the Terminal icon appears, click on it to launch it.

Step 2: Install the network scanning tool Nmap

Now in the Terminal application, run the following command as sudo to install the network scanning tool Nmap.

When prompted for the password, enter the sudo password.

The system will provide you with a y/n option to confirm the installation. Press Y to confirm and then wait for a while until the installation is completed on your system.

Step 3: Get the IP range/subnet mask of your network

Nmap needs a network ID to scan for the connected device on a specific network. So to find the network ID, we will need our IP address and the subnet mask.

Run the below command in the Terminal to find the IP address and subnet mask of your system:

The above output indicates that our system uses the IP address 192.168.72.164 /24. /24 indicates our subnet mask is 255.255.255.0. It means our network ID is 192.168.72.0 and the network range is 192.168.72.1 to 192.168.72.255.

(Note: Network ID is calculated by performing the AND operation of the IP address and the subnet mask. If you do not know how to perform AND operation, you can any online subnet calculator).

Step 4: Scan the network (LAN/WAN) for connected device(s) with Nmap

Now we have our network ID, run the Nmap scan with –sn option using the following syntax:

In our scenario, it would be:

Using Nmap with –sn option does not scan the ports, it only returns a list of live hosts:

The above results show that three active devices are connected to our network, including our system (192.168.72.164).

That’s it! We have learned how to use the Nmap tool to find the connected devices on a network. It can help you find out which unwanted users are connected to your network and using its bandwidth.

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Find Devices Connected to Your Network with nmap on Ubuntu 22.04

As Ubuntu users, we may want to know if we are the only ones using our network, especially the WLAN, or if there are other unwanted users exploiting our network bandwidth. This capability and knowledge are also helpful when we want to be sure that no hacker is accessing our system by connecting to our network.

Scan your network with Nmap on Ubuntu

This article describes step by step how to use the Nmap tool, which provides you with a list of all devices connected to your network. We have run the commands and procedures described in this article on Ubuntu 22.04 LTS.

Step 1: Open the Ubuntu command line

We will be using the Ubuntu command line, the Terminal, in order to view the devices connected to our network. Open the Terminal either through the system Dash or the Ctrl+Alt+T shortcut.

Step 2: Install the network scanning tool Nmap

When it comes to reliable network scanning, Nmap is a tool that you can totally depend on.

Enter the following command as sudo in the Terminal application in order to install the tool.

The system will ask you for the password for sudo since only an authorized user can install/uninstall and configure software on Ubuntu.

The system will also ask you to confirm the installation with y/n. Please type y and press enter to start the installation process.

Step 3: Determine the IP range/subnet mask of your network

To know which devices are connected to your network, you first need to determine the IP range or subnet mask of your network. We will use the ifconfig command to determine this IP. To run the ifconfig command, we need to install the net-tools package on our Ubuntu server or desktop. Use the following command to install net-tools if you do not already have it installed on your system:

$ sudo apt install net-tools

The system will prompt you with a y/n option to confirm the installation. Please enter Y and hit enter to begin the installation process.

Once you have the net-tools utility available, run the following command to get information about the network(s) your system is connected to:

The highlighted IP in the output shows that our system uses the subnet mask 192.168.100.0, and the range is 255. So our network IP range is from 192.168.100.0 to 192.168.100.255.

Alternative Installation via Ubuntu GUI

Instead of using the ifconfig tool, you can also get the subnet mask from the Ubuntu user interface.

Access the settings utility in System Dash and check the details of your network by clicking on the settings icon next to the WLAN or Ethernet network you are connected to.

In this example, we have checked the settings of a wi-fi network we are currently connected to.

The highlighted ipv4 address or the Default Route address indicates that we are connected to a subnet IP 192.168.100.0

Step 4: Scan the network for the connected device(s) with Nmap

Through the Nmap tool, you can scan the report of all devices connected to a network by providing the subnet mask IP as follows:

The output shows that three devices are connected to the network: the router itself, the Linux system I use on my laptop, and my phone.

Step 5: Exit the terminal

Use the following command to exit the terminal application after extracting the information you need:

In this article, you learned how an Ubuntu user could install and use the Nmap command. We showed you how to see which devices are connected to your network. This way, you can verify that no unauthorized device is connected to your network.

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