Remove entries in the neighbour table on device eth0

Neighbour/ARP tables management IP subcommand.
More information: <https://manned.org/ip-neighbour.8>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

sudo ip neighbour flush dev {{eth0}}

click the source code to copy install ip neighbour on any operating system with command-not-found.com