Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

crash(8) [netbsd man page]

CRASH(8)						    BSD System Manager's Manual 						  CRASH(8)

NAME
crash -- examine and debug system images SYNOPSIS
crash [-M core] [-N kernel] DESCRIPTION
The crash command is used to examine and debug system images. If run without any arguments, crash operates on the running system. The options are as follows: -M core Operate on the specified crash dump instead of the default /dev/mem. Crash dumps should be from the same version of the system and same machine architecture as the running version of crash, and must be uncompressed. -N kernel Extract the name list from the specified kernel instead of the default /dev/ksyms. The command syntax used by crash is the same as the in-kernel debugger. See the ddb(4) manual page for more information. Operations and facilities that require a running system, such as breakpoints, are not supported by crash. crash does not provide pagination. However, by using the pipe symbol, output may be sent to commands available from the shell. For example: crash> ps | more crash> ps | grep ioflush SEE ALSO
ps(1), vmstat(1), ddb(4), pstat(8) HISTORY
The crash command appeared in NetBSD 6.0. BSD
March 7, 2009 BSD

Check Out this Related Man Page

CRASH(L)																  CRASH(L)

NAME
crash - analyze kernel dump or active system image SYNOPSIS
crash [ aps ] [ -bdvtiz ] [ -s sfile ] [ -c cfile ] [ -u addr ] DESCRIPTION
Synopsis of options - -b Brief mode; skip general display of processes -d Crash dump contains swap image. (default?) -v Verbose; dump much information about each proc [future] -t TTY structs to be dumpped -i Incore inode table to be printed -c FILE Provide non-standard file name for system image input -s FILE Provide non-standard symboltable input -u ADDR Trace a process other than currently selected one -z Interrupt Trace displayed aps Print PS & PC at time of interupt (doesn't do anything) crash examines a dump of unix which it looks for in the file sysdump. It prints out the contents of the general registers, the kernel stack and a traceback through the kernel stack. If an aps is specified, the ps and pc at time of interrupt are also printed out. The dump of the stack commences from a "reasonable" address and all addresses are relocated to virtual addresses by using the value of kdsa6 found in the dump. The following options may be specified. -b Brief mode; skip general display of processes. Only the currently selected process will be traced. -c cfile If the -c argument is found, the following argument is taken to be the name of a file containing the system image. The default is "/usr/sys/core". -s sfile If the -s argument is found the following argument is taken to be the name of a file, containing a symbol table which should be used in interpreting text addresses. The default is "/unix". -u addr Force a process to be displayed as if it were active when the crash occurred. addr is the octal address of the proc table entry. FILES
/unix system namelist /dev/swap swap device /usr/sys/core core file SEE ALSO
crash(8), adb(1), ps(1), rstat(1) DIAGNOSTICS
Missing arg Unable to Open file Format Error in symbolfile BUGS
Care should be used in running crash on "/dev/mem". Things can change while crash is running; the picture it gives is only a close approx- imation to reality. AUTHOR
Mike Muuss, JHU EE John Stewart, Teledyne Geotech March 1983 CRASH(L)

15 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

<, >, >> and of course |

A REAL dummy question: could someone explain to me the specifics of the <, >, >> and | symbols as they are used in Unix shells? I'm taking a bit of a crash course in this matter, and I feel this is very much a basic. I know that | is the pipe, meaning that it will tunnel the output of the... (4 Replies)
Discussion started by: der Kopf
4 Replies

2. Filesystems, Disks and Memory

Help with errors

I am very new to the world of Unix, in the middle of a crash course as I write this due to a system failure for my company. This system went down approximately 24 hours ago due to some apparent thunderstorms that passed through. The problem is that my company, like many others, has laid off... (5 Replies)
Discussion started by: Phaedirean
5 Replies

3. Shell Programming and Scripting

Restarting a Crashed Process

Hello, I host a couple of Call of Duty gameing servers. There are some hackers who love the crash them. When they crash them it simply causes a segmentaion fault and kills the PID. I was wondering it you could help me write a script to simply restart the program after it has been crashed. The... (9 Replies)
Discussion started by: Phobos
9 Replies

4. Filesystems, Disks and Memory

RUN OUT SPACE (Root)

Dear Buddies, Plz Help me out ,,,,,, the Unix Servers i m working on ,,,Somes times run out of space in root ,,,due the generation of a file named STA ....which causes the system to crash ,,,,, plz hlp me !!!!!!!!!!!!!!!!!!!!!! how to find out the file ....generation causes ...... ... (6 Replies)
Discussion started by: scorpiyanz
6 Replies

5. SCO

SCO 5.07 Panic / Core Dumps

Anyone know how you go about interrogating a panic / core dump with crash for SCO Unix (5 Replies)
Discussion started by: ccarcher
5 Replies

6. Shell Programming and Scripting

Perl - FileHandles that crash memory

I have a program that opens a file handle that reads a lot of logs, it uses globbing, for example ba* matches bananas.log, bank.log, etc. I have seven different names, each with several logs that I run to a grep pattern. I have subroutines for each match and a loop w/o args that processes this. ... (5 Replies)
Discussion started by: nj78
5 Replies

7. Red Hat

Linux crashdump

Hi there, Anyone there who has a procedure on how to crash a linux a system? We need to do some testing on our machines. And one of the test would be to crash the os. Appreciate you help. Thanks. Best regards, Sodapop (5 Replies)
Discussion started by: sodapop
5 Replies

8. Solaris

crash dump

hi , i have machine that is crashed how i can enable core dump file & how can i find it ? :confused: (4 Replies)
Discussion started by: lid-j-one
4 Replies

9. Emergency UNIX and Linux Support

HP-UX 11iv3 crash on integrity bl870c during os kernel boot

I have a problem it seems to me as kernel panic during os booting i attached screen shots for the error (7 Replies)
Discussion started by: h@foorsa.biz
7 Replies

10. UNIX for Dummies Questions & Answers

analyze linux crash dump

Can anybody let me know the steps how can I produce a crash dump and then analyze it? (4 Replies)
Discussion started by: rupeshkp728
4 Replies

11. Solaris

Solaris 10 zone crash dump file?

Hi, I'm running Solaris 10 with a zone called "testzone" If I do a "reboot -d" on the host, as expected the kernet panics, reboots and creates a crash dump file in /var/crash However no crash file is created in testzone. My question is how can I tell if a zone crashs or shuts down... (4 Replies)
Discussion started by: fastexit
4 Replies

12. SuSE

Chromium flashes and crashes

I am running openSUSE 11.2 with KDE4.5 on my eMachines e525. I just did a "zypper up" on my system and it reported that Chromium was going to be updated. I agreed and the when the update was finished I shut down Chromium and started it again. It flickered on the screen for a moment and crashed.... (6 Replies)
Discussion started by: Druonysus
6 Replies

13. Shell Programming and Scripting

script to grep only the lasts errors

Hi, sorry if there already a thread about this, I did a little bit of digging but haven't found exactly what I want. I have a java application on a glassfish server who crash from time to time :D I need a script to allert me if there's a error like "java heappspace" or "out of memory" in the... (5 Replies)
Discussion started by: jblecrou
5 Replies

14. HP-UX

Sudden application crash in servers

Hi, This weekend there was a sudden application crash in the server. I did not know where to start to investigate the problem, so I first looked into the /var/adm/syslog/syslog.log, and this was what I found : Dec 17 00:38:02 L28bi01 sshd: error: accept: No buffer space available Dec 17... (9 Replies)
Discussion started by: anaigini45
9 Replies

15. AIX

Crash dump and Panic message : RSCT Dead Man Switch Timeout for HACMP; halting non-responsive node

Dear all i have two aix system -Model : P770 -OS version: AIX 6.1 -patch level : 6100-07-04-1216 -ha version : HACMP v 6.1.0.8 -host : A, B last Wednesday, my B system suddenly went down with crash dump. after 1 minute, A system went down with crash dump. I checked the dump of A-system... (6 Replies)
Discussion started by: tomato00
6 Replies

Featured Tech Videos