How to extract the kernel ring buffer from a vmcore file

Solution Verified - Updated -

Issue

  • How to extract the contents of the kernel ring buffer from a vmcore file
  • Unable to FTP vmcore to Red Hat
  • Unable to use passive FTP
  • Corporate firewall blocking Red Hat's FTP site
  • Unable to upload vmcore

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5
  • makedumpfile

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