AIX : Calculate the SHA256 hashes of a file

  http://www.commandlinefu.com/commands/view/12734/ibm-aix-calculate-the-sha256-hashes-of-a-directory-without-sha256sum    

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GPFS : delete a configured cluster you just created (Testing only)

Easiest , dirtiest and quickest way I found to delete a freshly configured GPFS cluster (DON’T DO THIS ON A PRODUCTION SERVER !!! IT IS FOR TESTING/DEV PURPOSES ONLY !!! ) : GPFS V4 : change to CCR mode I

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