what

...is taking up my bandwidth?!

(display current network utilization by process, connection and remote IP/hostname)

This is my first attempt at Rust. :)

How does it work?

what sniffs a given network interface and records IP packet size, cross referencing it with the /proc filesystem. It is responsive to the terminal window size, displaying less info if there is no room for it. It will also attempt to resolve ips to their host name in the background using reverse DNS on a best effort basis.

Installation

At the moment, what is available through Cargo as a binary package.

Usage

what -i <interface-name> eg. what -i eth0

Note that since what sniffs network packets, it requires root privileges - so you might want to use it with (for example) sudo.