ttyplot is a realtime plotting utility for text mode consoles and
terminals with data input from stdin / pipe.

ttyplot takes data from standard input / unix pipeline, most commonly
some tool like ping, snmpget, netstat, ip link, ifconfig, sar, vmstat,
etc. and plots in text mode on a terminal in real time. ttyplot also
supports rate calculation for counters and up to two graphs on a single
display using reverse video for the second line.