php5-fpm崩溃了，我们想知道当时正在执行什么。由于这种情况发生在生产环境中，因此无法通过xdebug获得信息。
我将失败的实例驱动器挂载到另一个实例(/mnt)，并尝试读取崩溃文件：
版本信息
root@dev:/mnt/var/crash# cat /mnt/etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=12.04
DISTRIB_CODENAME=precise
DISTRIB_DESCRIPTION="Ubuntu 12.04.4 LTS"
root@dev:/mnt/var/crash# gdb /mnt/usr/sbin/php5-fpm _usr_sbin_php5-fpm.1002.crash
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2.1) 7.4-2012.04
Copyright (C) 2012 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.launchpad.net/gdb-linaro/>...
Reading symbols from /mnt/usr/sbin/php5-fpm...(no debugging symbols found)...done.
"/mnt/var/crash/_usr_sbin_php5-fpm.1002.crash" is not a core dump: File format not recognized
接着尝试崩溃：
root@dev:/mnt/var/crash# crash _usr_sbin_php5-fpm.1002.crash
crash 6.1.6
Copyright (C) 2002-2013 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: _usr_sbin_php5-fpm.1002.crash: not a supported file format
[...]
Signal: 11
Uname: Linux 3.2.0-59-virtual x86_64
UserGroups:
CoreDump: base64
H4sICAAAAAAC/0NvcmVEdW1wAA==
[...]
有什么办法可以阅读这个吗？