------------------------------------------------
--> iostat
Linux 3.11.10-29-desktop (linux-srvr) 	03/05/2016 	_x86_64_	(2 CPU)

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.60    0.01    0.32    0.33    0.00   98.74

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
sda               1.47        37.76        42.97  166646689  189666320
sdb               0.17        17.23        10.51   76057153   46390644


------------------------------------------------
--> iostat --help
Usage: iostat [ options ] [  [  ] ]
Options are:
[ -c ] [ -d ] [ -h ] [ -N ] [ -k | -m ] [ -t ] [ -V ] [ -x ] [ -z ]
[ [ [ -T ] -g  ] {  [...] | ALL } ]
[ -p [  [,...] | ALL ] ]

------------------------------------------------
--> man iostat | col -b | grep -v ^$ > man.iostat.txt