PowerLinux
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Linux on eServer p5 series, formerly called RS/6000 (for RISC System/6000), is a ppc64 linux port running on IBM POWER based servers. Since eServer p5 series and 2.6 Kernel Linux can utilize logical partitioning, micro partitioning and RAS features of POWER5. There is a entry/midrange line of IBM called OpenPower and running Linux only (other p5 servers can also run AIX)