arping:tldr:459ed

The command "arping ${host_ip}" is used to send ARP (Address Resolution Protocol) requests to a specific IP address.

ARP is a protocol used to map an IP address to a physical (MAC) address on a local network. By sending an ARP request, the command tries to discover the MAC address associated with the provided IP address.

Here's how the command works:

• "arping" is the command itself, which is usually available on Unix-like operating systems.
• "${host_ip}" is a placeholder for the actual IP address you want to send ARP requests to. It should be replaced with the desired IP address.
• When the command is executed, it sends an ARP request packet to the network containing the IP address specified by ${host_ip}.
• If the target device is on the local network and reachable, it will respond with its MAC address, allowing the command to determine the mapping between the IP and MAC address.

This command can be helpful for troubleshooting network connectivity issues, validating or updating ARP cache entries, or verifying the presence of a device on the network.