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Oracle Linux, formerly known as Oracle Enterprise Linux, is a Linux distribution based on Red Hat Enterprise Linux (RHEL), repackaged and freely distributed by Oracle, available under the GNU General Public License (GPL) since late 2006.〔(【引用サイトリンク】url=http://www.oracle.com/us/technologies/027617.pdf )〕 Oracle Linux can be downloaded through Oracle's E-delivery service or from a variety of mirror sites, and can be deployed and distributed without cost.〔(【引用サイトリンク】title=Fast, Modern, Reliable Linux at a Fraction of the Cost of Red Hat )〕 Commercial technical support is available through Oracle's ''Oracle Linux Support program'', which supports Oracle Linux, and existing RHEL or CentOS installations (i.e. without reinstallation〔(【引用サイトリンク】title=Switching from Red Hat Network to Unbreakable Linux Network (ULN) )〕).〔 As of 2013, Oracle Linux has over 11,000 customers subscribed to the support program. ==RHEL compatibility== Oracle Corporation distributes Oracle Linux with two alternative kernels: * ''Red Hat Compatible Kernel'' (RHCK) identical to the kernel shipped in Red Hat Enterprise Linux * ''Unbreakable Enterprise Kernel'' (UEK) based on newer mainline Linux kernel versions, with Oracle's own enhancements for OLTP, InfiniBand, and SSD disk access, NUMA-optimizations, Reliable Datagram Sockets (RDS), async I/O, OCFS2, and networking. Oracle claims that the Unbreakable Enterprise Kernel is compatible with RHEL, and that Oracle middleware and third-party RHEL-certified applications can install and run unchanged on the Unbreakable Enterprise Kernel. For users requiring strict compatibility with Red Hat or for users running kernel modules dependent on specific kernel versions, the Red Hat Compatible Kernel offers 100% compatibility with Red Hat Enterprise Linux.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Oracle Linux」の詳細全文を読む スポンサード リンク
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