what is the meaning of result of uname -a [closed]

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http://stackoverflow.com – 1) when i execute the uname -a , it gives result as Linux linux.com 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:43 EDT 2010 i686 i686 i386 GNU/Linux what it means of each parts??? 2) is kernal distribution information and OS information are same?? lsb_release -a LSB Version: :core-3.1-ia32:core-3.1-noarch:graphics-3.1-ia32:graphics-3.1-noarch Distributor ID: RedHatEnterpriseServer Description: Red Hat Enterprise Linux Server release 5.5 (Tikanga) Release: 5.5 Codename: Tikanga (HowTos)