CentOS (abbreviated from Community Enterprise Operating System) is a Linux distribution that attempts to provide a free, enterprise-class, community-supported computing platform which aims to be functionally compatible with its upstream source, Red Hat Enterprise Linux (RHEL). In January 2014, CentOS announced the official joining with Red Hat while staying independent from RHEL, under a new CentOS governing board.
The first CentOS release in May 2004, numbered as CentOS version 2, was forked from RHEL version 2.1AS. Since the release of version 7.0, CentOS officially supports only the x86-64 architecture, while versions older than 7.0-1406 also supportx86 with Physical Address Extension (PAE), with additional architectures supported in CentOS versions older than 4.7; a beta release is expected to be available for the PowerPC architecture.
This post will guide you a step-by-step installation of Community ENTerprise Operating System 6.3 (CentOS) with screenshots. Less than three weeks after the release of Red Hat Enterprise Linux (RHEL) 6.3. The CentOS Project has released its clone of RHEL 6.3 distribution on 09 July 2012.