Though you may not have heard of it, but the Linux dstat command is an especially useful tool.
It combines the power and insights of commands like vmstat, iostat and ifstat and is
one of the best tools for examining system resources and one of the most versatile.

Chances are, you will have to install it on your server. Of course, a simple yum install dstat or similar command should have you ready in minutes.

The dstat command is itself actually a python script. So, yes, you also need to have python installed on your system to
use it and there are certain release constraints. Be aware that dstat requires
python 2.2 or later and a kernel version of 2.6.20 or better.

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