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* Description: Knowledge of checking Linux kernel version and OS release
* Date: 10:42 AM EST, 08/31/2017
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<1> Check Red Hat Linux release:
     |
     |__ $ cat /etc/redhat-release
     |
     |        Red Hat Enterprise Linux Server release 6.8 (Santiago)
     |
     |
     |__ $ cat /etc/*-release
			 
			 
			 
			 
<2> Check Linux kernel version:
     |
     |__ $ /proc/version		

             Linux version 2.6.32-642.11.1.el6.x86_64 (mockbuild@x86-027.build.eng.bos.redhat.com) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-17) (GCC) ) 
             #1 SMP Wed Oct 26 10:25:23 EDT 2016

             This file specifies the version of the Linux kernel, the version of gcc used to compile the kernel, and the time of kernel compilation. 
             It also contains the kernel compiler's user name (in parentheses).
             This information is used for a variety of purposes, including the version data presented when a user logs in.			 
			 



<3> Check all OS information:	
     |
     |__ $ uname -a

             Linux nebf1s2k242.nebf.com 2.6.32-642.11.1.el6.x86_64 #1 SMP Wed Oct 26 10:25:23 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux