My system crashed and even though I haven't been able to know what caused the crash after going through the usual logs: messages, dmesg, secure, etc. There's nothing valuable I have seen on them so I decided to follow a tutorial in how to run the crash application to see what might have happened.
Every time I run it with:
$ sudo crash System.map-3.10.0-123.el7 vmlinuz-3.10.0-123.el7 vmcore
I get the following error:
crash: vmlinuz-3.10.0-123.el7: not a supported file format
Here's the output:
crash 7.0.9-5.el7_1 Copyright (C) 2002-2014 Red Hat, Inc. Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005, 2011 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. This program is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Enter "help copying" to see the conditions. This program has absolutely no warranty. Enter "help warranty" for details. crash: vmlinuz-3.10.0-123.el7: not a supported file format Usage: crash [OPTION]... NAMELIST MEMORY-IMAGE[@ADDRESS] (dumpfile form) crash [OPTION]... [NAMELIST] (live system form) Enter "crash -h" for details.
I'm using CentOS 7. What might be wrong? And also, Any ideas how to get better information about the crash would be appreciated.