A friend of my lately introduced to tools called advanced IP scanner. It a great tool. It basically scans all addresses to check the address of device even if this device is not in our network. When I connect a device on my computer and I don't know its IP address. If the device has or 3.3.3 or this tool will find it. A tool like Nmap works to find it if I know the range where my device could be.

I was wondering if there is a Linux alternative for this tool.

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    Or askubuntu.com/q/82480/158442 .. essentially, nmap. – muru Jul 20 '17 at 9:34
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    The arp tools can be helpful for cases where you don't know the IP range, for example, sudo arp -n. – muru Jul 20 '17 at 10:13