iotop
Display a table of current I/O usage by processes or threads.
TLDR
Start top-like I/O monitor
$ sudo iotop
Show only processes or threads actually doing I/O
$ sudo iotop --only
Show I/O usage in non-interactive mode
$ sudo iotop --batch
Show only I/O usage of processes (default is to show all threads)
$ sudo iotop --processes
Show I/O usage of given PID(s)
$ sudo iotop --pid=[PID]
Show I/O usage of a given user
$ sudo iotop --user=[user]
Show accumulated I/O instead of bandwidth
$ sudo iotop --accumulated
