pv - Pipe Viewer - is a terminal-based tool for monitoring the
progress of data through a pipeline. It can be inserted into any
normal pipeline between two processes to give a visual indication of
how quickly data is passing through, how long it has taken, how near
to completion it is, and an estimate of how long it will be until
completion.
Signed-off-by: Max Howell <max@methylblue.com>
