The great thing about working with Linux is the constant, serendipitous, discovery of the "best" command line tool ever. This happened to me the other day when I discovered, possibly the best ever, command line utility for network diagnostics.
"mtr" a network diagnostic tool
The mtr utility investigates the network connection between the host that mtr runs on and a target machine. Essentially it is a dynamic traceroute that constantly updates, and shows, at which router your great bandwidth pipe, gets squeezed to a trickle with a calculated mean and standard deviation.