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Ubuntu - Network - ARP - Add multiple entries to the ARP cache table at once

The arp utility supports taking entries from a file.

Simply pass the file path as an argument to arp command.

By default the /etc/ethers file is used.

The file content should look like this:

12:f7:fd:48:aa:79 10.12.2.40
12:48:08:aa:a5:bb 10.12.2.43

Now you can give the path of the file as argument.

arp -f /etc/ethers