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

     crash -- examine and debug system images

     crash [-w] [-M core] [-N kernel]

     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.

     -w            Enable writing.

     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 break-
     points, 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

     You can obtain a full list of all kernel stack traces with a shell pipe-
     line like the following:

         # echo ps | crash | grep '^[0-9]' | cut -c 30-46 | \
           sed 's,^,bt/a ,' | crash

     ps(1), vmstat(1), ddb(4), pstat(8)

     The crash command appeared in NetBSD 6.0.

     The crash command for the sparc port is unstable.

NetBSD 9.0                      March 22, 2019                      NetBSD 9.0

You can also request any man page by name and (optionally) by section:


Use the DEFAULT collection to view manual pages for third-party software.

©1994 Man-cgi 1.15, Panagiotis Christias
©1996-2019 Modified for NetBSD by Kimmo Suominen