IBM opens the mainframe to contemporary Linux Another approach to deal with the looming mainframe skills shortage is to move mainframes to modern operating systems. For example, IBM's z/OS is no longer the only game in town when it comes to IBM mainframe operating systems; these mainframes can now run the more contemporary Linux OS. IDC analyst Jean Bozman says that, as of its last check in 2009, 30% of all System Z mainframes ship with at least one Linux instance, known as Integrated Facility for Linux.
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