An IBM sponsored site at Marist College, provides precompiled kernel and disk images, installation instructions, and a QuickStart guide. A good place to got when you are ready to install Linux/390.
http://linux390.marist.edu/
IBM site with details of the port of Linux to the S/390 and zSeries architecture. Includes source-code download.
http://www.ibm.com/developerworks/linux/linux390/
Article about bringing Linux to the S/390 mainframe world--and the results are practical and affordable.
http://www.linuxplanet.com/linuxplanet/reports/1532/1/
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