9.2.1 Installing the crash Packages

To use crash, you must install the crash package and the appropriate debuginfo and debuginfo-common packages.

To install the required packages:

  1. Install the latest version of the crash package:

    # yum install crash
  2. Download the appropriate debuginfo and debuginfo-common packages for the vmcore or kernel that you want to examine from https://oss.oracle.com/ol7/debuginfo/:

    • If you want to examine the running Unbreakable Enterprise Kernel on the system, use commands such as the following to download the packages:

      # export DLP="https://oss.oracle.com/ol7/debuginfo"
      # wget ${DLP}/kernel-uek-debuginfo-`uname -r`.rpm
      # wget ${DLP}/kernel-uek-debuginfo-common-`uname -r`.rpm
    • If you want to examine the running Red Hat Compatible Kernel on the system, use commands such as the following to download the packages:

      # export DLP="https://oss.oracle.com/ol7/debuginfo"
      # wget ${DLP}/kernel-debuginfo-`uname -r`.rpm
      # wget ${DLP}/kernel-debuginfo-common-`uname -r`.rpm
    • If you want to examine a vmcore file that relates to a different kernel than is currently running, download the appropriate debuginfo and debuginfo-common packages for the kernel that produce the vmcore, for example:

      # export DLP="https://oss.oracle.com/ol7/debuginfo"
      # wget ${DLP}/kernel-uek-debuginfo-4.1.12-112.14.15.el7uek.x86_64.rpm 
      # wget ${DLP}/kernel-uek-debuginfo-common-4.1.12-112.14.15.el7uek.x86_64.rpm
      Note

      If the vmcore file was produced by Kdump, you can use the following crash command to determine the version:

      # crash --osrelease /var/tmp/vmcore/2013-0211-2358.45-host03.28.core
      2.6.39-200.24.1.el6uek.x86_64
  3. Install the debuginfo and debuginfo-common packages, for example:

    # rpm -Uhv kernel-uek-debuginfo-4.1.12-112.14.15.el7uek.x86_64.rpm \
      kernel-uek-debuginfo-common-4.1.12-112.14.15.el7uek.x86_64.rpm

    The vmlinux kernel object file (also known as the namelist file) that crash requires is installed in /usr/lib/debug/lib/modules/kernel_version/.