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:

Install the latest version of the crash package:
```
# yum install crash
```
Download the appropriate debuginfo and debuginfo-common packages for the vmcore or kernel that you want to examine from https://oss.oracle.com/ol6/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/ol6/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/ol6/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/ol6/debuginfo"
# wget ${DLP}/kernel-uek-debuginfo-2.6.32-300.27.1.el6uek.x86_64.rpm
# wget ${DLP}/kernel-uek-debuginfo-common-2.6.32-300.27.1.el6uek.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
```
Install the debuginfo and debuginfo-common packages, for example:
```
# rpm -Uhv kernel-uek-debuginfo-2.6.32-300.27.1.el6uek.x86_64.rpm \
  kernel-uek-debuginfo-common-2.6.32-300.27.1.el6uek.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/.