How to use the SysRq facility to collect information from a RHEL server

Solution Verified - Updated -

Issue

  • How to use the SysRq facility to collect information from a server which is frozen or unresponsive
  • How to manually force a crash in server hang conditions
  • If the system goes into a hung state, can a vmcore or core dumps be captured?
  • How do I enable SysRq to force a kernel panic?

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 3

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