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rated 0 times [ 8] [ 0] / answers: 1 / hits: 36084 / 2 Years ago, sat, january 8, 2022, 4:56:52

Is it possible to determine the IP addresses of systems within a network using a bash script? And how?

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Member since Sun, Dec 4, 2022

1 Year ago

answered 2 Years ago corsee · Accepted Answer

Install arp-scan (sudo apt-get install arp-scan) and add the following line to the script:

IPs=$(sudo arp-scan --localnet --numeric --quiet --ignoredups | grep -E '([a-f0-9]{2}:){5}[a-f0-9]{2}' | awk '{print $1}')

Now you have all the active IP addresses in the IPs variable.

Note: this will only work on a directly connected network, i.e. not accessed through a router.

PS: If you install gawk the command can be shortened to (thanks belacqua):

IPs=$(sudo arp-scan --localnet --quiet --ignoredups | gawk '/([a-f0-9]{2}:){5}[a-f0-9]{2}/ {print $1}')