How to extract the kernel ring buffer (dmesg) from the kernel crash (vmcore) file

Solution Verified - Updated -

Issue

  • How to extract the contents of the kernel ring buffer from the kernel crash dump (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 10
  • Red Hat Enterprise Linux 9
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 5
  • makedumpfile

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content