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* Description: Command of displaying IO state on Linux platform
* Date: 03:42 PM EST, 06/13/2017
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<1> Command "iostat":
     |
     |__ $ iostat 2 3
         |
         |__ o. The utility generates three types of reports, the CPU Utilization report, the Device Utilization report and the Network Filesystem report.	      
             o. Above indicates displaying the report every 2 seconds for 3 times.
			 
             =======================================================================================================
	 
             Linux 2.6.32-642.11.1.el6.x86_64 (nebf1s2k242.nebf.com)         06/13/2017      _x86_64_        (2 CPU)
             
             avg-cpu:  %user   %nice %system %iowait  %steal   %idle
                        1.79    0.00    0.52    7.11    0.00   90.58
             
             Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
             sda               2.14       275.62        10.38  175643526    6612686
             sdb              18.68      3690.22      1013.96 2351662074  646166160
             sdc               0.00         0.01         0.00       3720          0
             dm-0              2.22       161.87         8.05  103155330    5131312
             dm-1              0.01         0.01         0.10       8016      65848
             dm-2              0.77       113.05         2.22   72042826    1415368
             
             avg-cpu:  %user   %nice %system %iowait  %steal   %idle
                        0.25    0.00    0.00    0.25    0.00   99.50
             
             Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
             sda               0.00         0.00         0.00          0          0
             sdb               2.00         0.00        48.00          0         96
             sdc               0.00         0.00         0.00          0          0
             dm-0              0.00         0.00         0.00          0          0
             dm-1              0.00         0.00         0.00          0          0
             dm-2              0.00         0.00         0.00          0          0
             
             avg-cpu:  %user   %nice %system %iowait  %steal   %idle
                        0.00    0.00    0.25    0.00    0.00   99.75
             
             Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
             sda               0.00         0.00         0.00          0          0
             sdb               0.00         0.00         0.00          0          0
             sdc               0.00         0.00         0.00          0          0
             dm-0              0.00         0.00         0.00          0          0
             dm-1              0.00         0.00         0.00          0          0
             dm-2              0.00         0.00         0.00          0          0