How to check the detail of a content of an initramfs or initrd file?

Solution Verified - Updated -

Issue

  • Some kernel parameters are not default vaules after OS boot.
  • /etc/sysctl.conf file looks default.
  • How to check the configuration of a content of an initramfs or initrd file?

Environment

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

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