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MAKEDUMPFILE(8)       Linux System Administrator's Manual      MAKEDUMPFILE(8)

NAME
       makedumpfile - make a small dumpfile of kdump
SYNOPSIS
       makedumpfile    [OPTION] [-x VMLINUX|-i VMCOREINFO] VMCORE DUMPFILE
       makedumpfile -F [OPTION] [-x VMLINUX|-i VMCOREINFO] VMCORE
       makedumpfile   [OPTION] -x VMLINUX [--config FILTERCONFIGFILE] [--eppic
       EPPICMACRO] VMCORE DUMPFILE
       makedumpfile -R DUMPFILE
       makedumpfile --split [OPTION] [-x VMLINUX|-i VMCOREINFO]  VMCORE  DUMP-
       FILE1 DUMPFILE2 [DUMPFILE3 ..]
       makedumpfile  [OPTION] [-x VMLINUX|-i VMCOREINFO] --num-threads THREAD-
       NUM VMCORE DUMPFILE
       makedumpfile --reassemble DUMPFILE1 DUMPFILE2 [DUMPFILE3 ..] DUMPFILE
       makedumpfile -g VMCOREINFO -x VMLINUX
       makedumpfile    [OPTION] [--xen-syms XEN-SYMS|--xen-vmcoreinfo  VMCORE-
       INFO] VMCORE DUMPFILE
       makedumpfile  --dump-dmesg [--partial-dmesg] [-x VMLINUX|-i VMCOREINFO]
       VMCORE LOGFILE
       makedumpfile    [OPTION] -x VMLINUX --diskset=VMCORE1 --diskset=VMCORE2
       [--diskset=VMCORE3 ..] DUMPFILE
       makedumpfile -h
       makedumpfile -v
DESCRIPTION
       With kdump, the memory image of the first kernel (called "panicked ker-
       nel") can be taken as /proc/vmcore  while  the  second  kernel  (called
       "kdump  kernel"  or  "capture kernel") is running. This document repre-
       sents /proc/vmcore as VMCORE. makedumpfile makes a  small  DUMPFILE  by
       compressing  dump  data or by excluding unnecessary pages for analysis,
       or both. makedumpfile needs the first kernel's  debug  information,  so
       that  it  can  distinguish unnecessary pages by analyzing how the first
       kernel uses the memory.  The information can be taken from  VMLINUX  or
       VMCOREINFO.
       makedumpfile  can  exclude  the  following types of pages while copying
       VMCORE to DUMPFILE, and a user can choose which type of pages  will  be
       excluded.
       - Pages filled with zero
       - Cache pages without private flag (non-private cache)
       - Cache pages with private flag (private cache)
       - User process data pages
       - Free pages
       makedumpfile  provides  two  DUMPFILE  formats  (the ELF format and the
       kdump-compressed format). By default, makedumpfile makes a DUMPFILE  in
       the  kdump-compressed  format.  The kdump-compressed format is readable
       only with the crash utility, and it can be smaller than the ELF  format
       because of the compression support. The ELF format is readable with GDB
       and the crash utility.  If a user wants to use GDB, DUMPFILE format has
       to be explicitly specified to be the ELF format.
       Apart  from  the  exclusion of unnecessary pages mentioned above, make-
       dumpfile allows user to filter out targeted  kernel  data.  The  filter
       config  file  can be used to specify kernel/module symbols and its mem-
       bers that need to be filtered out through  the  erase  command  syntax.
       makedumpfile  reads  the  filter  config  and builds the list of memory
       addresses and its sizes after processing filter  commands.  The  memory
       locations  that require to be filtered out are then poisoned with char-
       acter 'X' (58 in Hex). Refer to makedumpfile.conf(5) for file format.
       Eppic macros can also be used to specify kernel symbols and its members
       that need to be filtered. Eppic provides C semantics including language
       constructs such as conditional statements, logical and arithmetic oper-
       ators,  functions,  nested  loops  to  traverse  and erase kernel data.
       --eppic requires eppic_makedumpfile.so and eppic  library.  eppic_make-
       dumpfile.so   can   be   built   from  makedumpfile  source.  Refer  to
       http://code.google.com/p/eppic/ to build eppic library  libeppic.a  and
       for more information on writing eppic macros.
       To  analyze  the first kernel's memory usage, makedumpfile can refer to
       VMCOREINFO instead of VMLINUX. VMCOREINFO contains the  first  kernel's
       information  (structure  size,  field  offset, etc.), and VMCOREINFO is
       small enough to be included into the second kernel's initrd.
       If the second kernel is running on its initrd without mounting  a  root
       file  system,  makedumpfile  cannot refer to VMLINUX because the second
       kernel's initrd cannot include a large file like VMLINUX. To solve  the
       problem,  makedumpfile  makes  VMCOREINFO  beforehand, and it refers to
       VMCOREINFO instead of VMLINUX while the second kernel is running.
       VMCORE has contained VMCOREINFO since linux-2.6.24, and a user does not
       need to specify neither -x nor -i option.
       If the second kernel is running on its initrd without mounting any file
       system, a user needs to transport the dump data to a  remote  host.  To
       transport  the  dump data by SSH, makedumpfile outputs the dump data in
       the intermediate format (the flattened format) to the standard  output.
       By piping the output data to SSH, a user can transport the dump data to
       a remote host. Note that analysis tools (crash utility  before  version
       5.1.2 or GDB) cannot read the flattened format directly, so on a remote
       host the received data in the flattened format needs to  be  rearranged
       to a readable DUMPFILE format by makedumpfile (or makedumpfile-R.pl).
       makedumpfile can read a DUMPFILE in the kdump-compressed format instead
       of VMCORE and re-filter it. This feature is useful  in  situation  that
       users need to reduce the file size of DUMPFILE for sending it somewhere
       by ftp/scp/etc. (If all of the page types, which are specified by a new
       dump_level, are excluded from an original DUMPFILE already, a new DUMP-
       FILE is the same as an original DUMPFILE.)
       For example, makedumpfile can create a DUMPFILE of dump_level  31  from
       the one of dump_level 3 like the following:
       Example:
       # makedumpfile -c -d 3 /proc/vmcore dumpfile.1
       # makedumpfile -c -d 31 dumpfile.1 dumpfile.2
       makedumpfile  can read VMCORE(s) in three kinds of sadump formats: sin-
       gle partition format, diskset format and media backup format,  and  can
       convert  each  of  them into kdump-compressed format with filtering and
       compression processing. Note that for VMCORE(s) created by sadump,  you
       always  need  to  pass  VMLINUX  with -x option. Also, to pass multiple
       VMCOREs created on diskset configuration, you  need  to  use  --diskset
       option.

OPTIONS
       -c,-l,-p
              Compress  dump  data  by each page using zlib for -c option, lzo
              for -l option  or  snappy  for  -p  option.   (-l  option  needs
              USELZO=on and -p option needs USESNAPPY=on when building)
              A  user  cannot  specify this option with -E option, because the
              ELF format does not support compressed data.
              Example:
              # makedumpfile -c -d 31 -x vmlinux /proc/vmcore dumpfile

       -d dump_level
              Specify the type of unnecessary page for analysis.
              Pages of the specified type are not copied to DUMPFILE. The page
              type marked in the following table is excluded. A user can spec-
              ify multiple page types by setting the sum of each page type for
              dump_level.  The  maximum  of  dump_level  is  31.  Note  that a
              dump_level for Xen dump filtering is 0 or 1 on a  machine  other
              than  x86_64.  On  a x86_64 machine, even 2 or bigger dump level
              will be effective if you  specify  domain-0's  vmlinux  with  -x
              option.  Then the pages are excluded only from domain-0.
              If specifying multiple dump_levels with the delimiter ',', make-
              dumpfile retries to create a DUMPFILE by other  dump_level  when
              "No  space  on device" error happens. For example, if dump_level
              is "11,31" and makedumpfile fails by dump_level 11, makedumpfile
              retries it by dump_level 31.
              Example:
              # makedumpfile -d 11 -x vmlinux /proc/vmcore dumpfile
              # makedumpfile -d 11,31 -x vmlinux /proc/vmcore dumpfile
              Base level:
              dump_level  consists of five bits, so there are five base levels
              to specify the type of unnecessary page.
                    1 : Exclude the pages filled with zero.
                    2 : Exclude the non-private cache pages.
                    4 : Exclude all cache pages.
                    8 : Exclude the user process data pages.
                   16 : Exclude the free pages.
              Here is the all combinations of the bits.
                     |      |non-   |       |      |
                dump | zero |private|private| user | free
               level | page |cache  |cache  | data | page
              -------+------+-------+-------+------+------
                   0 |      |       |       |      |
                   1 |  X   |       |       |      |
                   2 |      |   X   |       |      |
                   3 |  X   |   X   |       |      |
                   4 |      |   X   |   X   |      |
                   5 |  X   |   X   |   X   |      |
                   6 |      |   X   |   X   |      |
                   7 |  X   |   X   |   X   |      |
                   8 |      |       |       |  X   |
                   9 |  X   |       |       |  X   |
                  10 |      |   X   |       |  X   |
                  11 |  X   |   X   |       |  X   |
                  12 |      |   X   |   X   |  X   |
                  13 |  X   |   X   |   X   |  X   |
                  14 |      |   X   |   X   |  X   |
                  15 |  X   |   X   |   X   |  X   |
                  16 |      |       |       |      |  X
                  17 |  X   |       |       |      |  X
                  18 |      |   X   |       |      |  X
                  19 |  X   |   X   |       |      |  X
                  20 |      |   X   |   X   |      |  X
                  21 |  X   |   X   |   X   |      |  X
                  22 |      |   X   |   X   |      |  X
                  23 |  X   |   X   |   X   |      |  X
                  24 |      |       |       |  X   |  X
                  25 |  X   |       |       |  X   |  X
                  26 |      |   X   |       |  X   |  X
                  27 |  X   |   X   |       |  X   |  X
                  28 |      |   X   |   X   |  X   |  X
                  29 |  X   |   X   |   X   |  X   |  X
                  30 |      |   X   |   X   |  X   |  X
                  31 |  X   |   X   |   X   |  X   |  X

       -E     Create DUMPFILE in the ELF format.
              This option cannot be specified with the -c, -l or  -p  options,
              because the ELF format does not support compressed data.
              Example:
              # makedumpfile -E -d 31 -x vmlinux /proc/vmcore dumpfile

       -f     Force  existing DUMPFILE to be overwritten and mem-usage to work
              with older kernel as well.
              Example:
              # makedumpfile -f -d 31 -x vmlinux /proc/vmcore dumpfile
              This command overwrites DUMPFILE even if it already exists.
              # makedumpfile -f --mem-usage /proc/kcore
              Kernel version lesser than v4.11 will not work with  --mem-usage
              functionality  until  it  has  been patched with upstream commit
              464920104bf7.  Therefore if you have patched your  older  kernel
              then use -f.

       -x VMLINUX
              Specify  the  first  kernel's  VMLINUX with debug information to
              analyze the first kernel's memory usage.
              This option is necessary if VMCORE does not contain  VMCOREINFO,
              [-i VMCOREINFO] is not specified, and dump_level is 2 or more.
              The  page  size of the first kernel and the second kernel should
              match.
              Example:
              # makedumpfile -d 31 -x vmlinux /proc/vmcore dumpfile

       -i VMCOREINFO
              Specify VMCOREINFO instead of VMLINUX for  analyzing  the  first
              kernel's memory usage.
              VMCOREINFO  should  be  made  beforehand by makedumpfile with -g
              option, and it contains the first kernel's information.
              This option is necessary if VMCORE does not contain  VMCOREINFO,
              [-x VMLINUX] is not specified, and dump_level is 2 or more.
              Example:
              # makedumpfile -d 31 -i vmcoreinfo /proc/vmcore dumpfile

       -g VMCOREINFO
              Generate  VMCOREINFO  from the first kernel's VMLINUX with debug
              information.
              VMCOREINFO must be generated on the system that is  running  the
              first kernel. With -i option, a user can specify VMCOREINFO gen-
              erated on the other system that is running the same  first  ker-
              nel. [-x VMLINUX] must be specified.
              Example:
              # makedumpfile -g vmcoreinfo -x vmlinux

       --config FILTERCONFIGFILE
              Used  in conjunction with -x VMLINUX option, to specify the fil-
              ter config file FILTERCONFIGFILE that contains erase commands to
              filter  out desired kernel data from vmcore while creating DUMP-
              FILE. For  filter  command  syntax  please  refer  to  makedump-
              file.conf(5).

       --eppic EPPICMACRO
              Used in conjunction with -x VMLINUX option, to specify the eppic
              macro file that contains filter rules or directory that contains
              eppic  macro files to filter out desired kernel data from vmcore
              while creating DUMPFILE.  When directory is specified,  all  the
              eppic macros in the directory are processed.

       -F     Output  the  dump  data  in the flattened format to the standard
              output for transporting the dump data by SSH.
              Analysis tools (crash utility before version 5.1.2 or GDB)  can-
              not  read  the flattened format directly. For analysis, the dump
              data in the flattened format should be rearranged  to  a  normal
              DUMPFILE  (readable  with analysis tools) by -R option. By which
              option is specified with -F option, the format of the rearranged
              DUMPFILE  is fixed.  In other words, it is impossible to specify
              the DUMPFILE format when the dump data  is  rearranged  with  -R
              option.  If  specifying  -E option with -F option, the format of
              the rearranged DUMPFILE is the ELF format. Otherwise, it is  the
              kdump-compressed format. All the messages are output to standard
              error output by -F option because standard output  is  used  for
              the dump data.
              Example:
              # makedumpfile -F -c -d 31 -x vmlinux /proc/vmcore \
              | ssh user@host "cat > dumpfile.tmp"
              # makedumpfile -F -c -d 31 -x vmlinux /proc/vmcore \
              | ssh user@host "makedumpfile -R dumpfile"
              # makedumpfile -F -E -d 31 -i vmcoreinfo  /proc/vmcore \
              | ssh user@host "makedumpfile -R dumpfile"
              # makedumpfile -F -E --xen-vmcoreinfo VMCOREINFO /proc/vmcore \
              | ssh user@host "makedumpfile -R dumpfile"

       -R     Rearrange  the  dump data in the flattened format from the stan-
              dard input to a normal DUMPFILE (readable with analysis tools).
              Example:
              # makedumpfile -R dumpfile < dumpfile.tmp
              # makedumpfile -F -d 31 -x vmlinux /proc/vmcore \
              | ssh user@host "makedumpfile -R dumpfile"
              Instead of using -R option, a  perl  script  "makedumpfile-R.pl"
              rearranges  the  dump  data  in the flattened format to a normal
              DUMPFILE, too. The perl script does not depend on  architecture,
              and  most systems have perl command.  Even if a remote host does
              not have makedumpfile, it is possible to rearrange the dump data
              in  the flattened format to a readable DUMPFILE on a remote host
              by running this script.
              Example:
              # makedumpfile -F -d 31 -x vmlinux /proc/vmcore \
              | ssh user@host "makedumpfile-R.pl dumpfile"

       --split
              Split the dump data to multiple DUMPFILEs in parallel. If speci-
              fying DUMPFILEs on different storage devices, a device can share
              I/O load with other devices and it reduces time for  saving  the
              dump  data.  The  file size of each DUMPFILE is smaller than the
              system memory size which is divided by the number of  DUMPFILEs.
              This feature supports only the kdump-compressed format.
              Example:
              #  makedumpfile  --split -d 31 -x vmlinux /proc/vmcore dumpfile1
              dumpfile2

       --num-threads THREADNUM
              Using multiple threads to read and compress data of each page in
              parallel.   And  it will reduces time for saving DUMPFILE.  Note
              that if the usable cpu number is less than the thread number, it
              may  lead  to  great performance degradation.  This feature only
              supports creating DUMPFILE in kdump-comressed format from VMCORE
              in kdump-compressed format or elf format.
              Example:
              # makedumpfile -d 31 --num-threads 4 /proc/vmcore dumpfile

       --reassemble
              Reassemble  multiple  DUMPFILEs,  which  are  created by --split
              option, into one DUMPFILE. dumpfile1 and dumpfile2 are  reassem-
              bled into dumpfile on the following example.
              Example:
              # makedumpfile --reassemble dumpfile1 dumpfile2 dumpfile

       -b <order>
              Cache 2^order pages in ram when generating DUMPFILE before writ-
              ing to output.  The default value is 4.

       --cyclic-buffer buffer_size
              Specify the buffer size in kilo bytes for bitmap data.   Filter-
              ing processing will be divided into multi cycles to fix the mem-
              ory consumption, the number of cycles is represented as:
                  num_of_cycles  =  system_memory  /  (buffer_size  *  1024  *
              bit_per_bytes * page_size )
              The  lesser  number  of  cycles,  the  faster  working  speed is
              expected.  By default, buffer_size will be calculated  automati-
              cally  depending  on system memory size, so ordinary users don't
              need to specify this option.
              Example:
              #  makedumpfile  --cyclic-buffer   1024   -d   31   -x   vmlinux
              /proc/vmcore dumpfile

       --splitblock-size splitblock_size
              Specify  the  splitblock  size  in  kilo bytes for analysis with
              --split.  If --splitblock N is  specified,  difference  of  each
              splitted dumpfile size is at most N kilo bytes.
              Example:
              #  makedumpfile  --splitblock-size 1024 -d 31 -x vmlinux --split
              /proc/vmcore dumpfile1 dumpfile2

       --work-dir
              Specify the working directory for the temporary bitmap file.  If
              this option isn't specified, the bitmap will be saved on memory.
              Filtering processing has to do 2 pass scanning to fix the memory
              consumption, but it can be avoided by using working directory on
              file system.  So if you specify this option, the filtering speed
              may be bit faster.
              Example:
              #  makedumpfile  --work-dir  /tmp  -d 31 -x vmlinux /proc/vmcore
              dumpfile

       --non-mmap
              Never use mmap(2) to read VMCORE even if  it  supports  mmap(2).
              Generally,  reading  VMCORE  with mmap(2) is faster than without
              it, so ordinary users don't need to specify this  option.   This
              option is mainly for debugging.
              Example:
              # makedumpfile --non-mmap -d 31 -x vmlinux /proc/vmcore dumpfile

       --xen-syms XEN-SYMS
              Specify the XEN-SYMS with debug information to analyze the xen's
              memory  usage.   This  option  extracts  the  part  of  xen  and
              domain-0.
              Example:
              # makedumpfile -E --xen-syms xen-syms /proc/vmcore dumpfile

       --xen-vmcoreinfo VMCOREINFO
              Specify  VMCOREINFO  instead of XEN-SYMS for analyzing the xen's
              memory usage.
              VMCOREINFO should be made beforehand  by  makedumpfile  with  -g
              option, and it contains the xen's information.
              Example:
              # makedumpfile -E --xen-vmcoreinfo VMCOREINFO /proc/vmcore dump-
              file

       -X     Exclude all the user domain pages from Xen kdump's  VMCORE,  and
              extracts the part of xen and domain-0. If VMCORE contains VMCOR-
              EINFO for Xen, it is not necessary  to  specify  --xen-syms  and
              --xen-vmcoreinfo.
              Example:
              # makedumpfile -E -X /proc/vmcore dumpfile

       --xen_phys_start xen_phys_start_address
              This    option    is    only    for    x86_64.     Specify   the
              xen_phys_start_address, if the xen code/data is relocatable  and
              VMCORE does not contain xen_phys_start_address in the CRASHINFO.
              xen_phys_start_address can be taken from the line of "Hypervisor
              code  and  data" in /proc/iomem. For example, specify 0xcee00000
              as xen_phys_start_address if /proc/iomem is the following:
                -------------------------------------------------------
                # cat /proc/iomem
                ...
                  cee00000-cfd99999 : Hypervisor code and data
                ...
                -------------------------------------------------------
              Example:
              # makedumpfile -E -X  --xen_phys_start  0xcee00000  /proc/vmcore
              dumpfile

       --message-level message_level
              Specify the message types.
              Users  can  restrict outputs printed by specifying message_level
              with this option. The message type marked with an X in the  fol-
              lowing  table  is  printed. For example, according to the table,
              specifying 7 as message_level means progress  indicator,  common
              message,  and  error  message are printed, and this is a default
              value. Note that the maximum value of message_level is 31.
               message | progress | common  | error   | debug   | report
               level   | indicator| message | message | message | message
              ---------+----------+---------+---------+---------+---------
                     0 |          |         |         |         |
                     1 |    X     |         |         |         |
                     2 |          |    X    |         |         |
                     3 |    X     |    X    |         |         |
                     4 |          |         |    X    |         |
                     5 |    X     |         |    X    |         |
                     6 |          |    X    |    X    |         |
                   * 7 |    X     |    X    |    X    |         |
                     8 |          |         |         |    X    |
                     9 |    X     |         |         |    X    |
                    10 |          |    X    |         |    X    |
                    11 |    X     |    X    |         |    X    |
                    12 |          |         |    X    |    X    |
                    13 |    X     |         |    X    |    X    |
                    14 |          |    X    |    X    |    X    |
                    15 |    X     |    X    |    X    |    X    |
                    16 |          |         |         |         |    X
                    17 |    X     |         |         |         |    X
                    18 |          |    X    |         |         |    X
                    19 |    X     |    X    |         |         |    X
                    20 |          |         |    X    |         |    X
                    21 |    X     |         |    X    |         |    X
                    22 |          |    X    |    X    |         |    X
                    23 |    X     |    X    |    X    |         |    X
                    24 |          |         |         |    X    |    X
                    25 |    X     |         |         |    X    |    X
                    26 |          |    X    |         |    X    |    X
                    27 |    X     |    X    |         |    X    |    X
                    28 |          |         |    X    |    X    |    X
                    29 |    X     |         |    X    |    X    |    X
                    30 |          |    X    |    X    |    X    |    X
                    31 |    X     |    X    |    X    |    X    |    X

       --vtop virtual_address
              This option is useful, when user debugs the translation  problem
              of  virtual  address. If specifing virtual_address, its physical
              address is printed. It makes debugging  easy  by  comparing  the
              output  of  this option with the one of "vtop" subcommand of the
              crash utility.  "--vtop" option only prints the translation out-
              put, and it does not affect the dumpfile creation.

       --dump-dmesg
              This  option  overrides  the  normal  behavior  of makedumpfile.
              Instead of  compressing  and  filtering  a  VMCORE  to  make  it
              smaller,  it  simply  extracts  the  dmesg log from a VMCORE and
              writes it to the specified LOGFILE. If a VMCORE does not contain
              VMCOREINFO for dmesg, it is necessary to specfiy [-x VMLINUX] or
              [-i VMCOREINFO].
              Example:
              # makedumpfile --dump-dmesg /proc/vmcore dmesgfile
              # makedumpfile --dump-dmesg -x vmlinux /proc/vmcore dmesgfile

       --partial-dmesg
              This option will make --dump-dmesg extract only dmesg logs since
              that  buffer  was  last  cleared  on the crashed kernel, through
              "dmesg --clear" for example.

       --mem-usage
              This option is currently supported on x86_64, arm64,  ppc64  and
              s390x.   This option is used to show the page numbers of current
              system in different use. It should be executed in 1st kernel. By
              the  help of this, user can know how many pages is dumpable when
              different dump_level is specified. It analyzes the 'System  Ram'
              and  'kernel  text' program segment of /proc/kcore excluding the
              crashkernel range, then calculates the page number of  different
              kind  per vmcoreinfo. So currently /proc/kcore need be specified
              explicitly.
              Example:
              # makedumpfile --mem-usage /proc/kcore

       --diskset=VMCORE
              Specify multiple VMCOREs created on sadump diskset configuration
              the  same number of times as the number of VMCOREs in increasing
              order from left to right.  VMCOREs are assembled into  a  single
              DUMPFILE.
              Example:
              #  makedumpfile  -x  vmlinux --diskset=vmcore1 --diskset=vmcore2
              dumpfile

       -D     Print debugging message.

       -h (--help)
              Show help message and LZO/snappy  support  status  (enabled/dis-
              abled).

       -v     Show the version of makedumpfile.

ENVIRONMENT VARIABLES
       TMPDIR  This environment variable is used in 1st kernel environment for
               a temporary memory bitmap file.  If your machine has a lots  of
               memory  and  you use small tmpfs on /tmp, makedumpfile can fail
               for a little memory because makedumpfile  makes  a  very  large
               temporary  memory bitmap file in this case. To avoid this fail-
               ure, you should specify --work-dir option to use file system on
               storage for the bitmap file.

DIAGNOSTICS
       makedumpfile exits with the following value.
       0 : makedumpfile succeeded.
       1 : makedumpfile failed without the following reasons.
       2  :  makedumpfile failed due to the different version between  VMLINUX
       and VMCORE.

AUTHORS
       Written by Masaki Tachibana, and Ken'ichi Ohmichi.

SEE ALSO
       crash(8), gdb(1), kexec(8), makedumpfile.conf(5)


makedumpfile v1.6.2               27 Jul 2017                  MAKEDUMPFILE(8)