Binary package “iotop” in ubuntu xenial

simple top-like I/O monitor

 iotop does for I/O usage what top(1) does for CPU usage. It watches I/O
 usage information output by the Linux kernel and displays a table of
 current I/O usage by processes on the system. It is handy for answering
 the question "Why is the disk churning so much?".
 iotop can only run under a Linux 2.6.20 or later kernel built with the
 CONFIG_VM_EVENT_COUNTERS build config options on.