coredump.conf(5) — Linux manual page


COREDUMP.CONF(5)              coredump.conf             COREDUMP.CONF(5)

NAME         top

       coredump.conf, coredump.conf.d - Core dump storage configuration

SYNOPSIS         top





DESCRIPTION         top

       These files configure the behavior of systemd-coredump(8), a
       handler for core dumps invoked by the kernel. Whether
       systemd-coredump is used is determined by the kernel's
       kernel.core_pattern sysctl(8) setting. See systemd-coredump(8)
       and core(5) pages for the details.


       The default configuration is set during compilation, so
       configuration is only needed when it is necessary to deviate from
       those defaults. Initially, the main configuration file in
       /etc/systemd/ contains commented out entries showing the defaults
       as a guide to the administrator. Local overrides can be created
       by editing this file or by creating drop-ins, as described below.
       Using drop-ins for local configuration is recommended over
       modifications to the main configuration file.

       In addition to the "main" configuration file, drop-in
       configuration snippets are read from /usr/lib/systemd/*.conf.d/,
       /usr/local/lib/systemd/*.conf.d/, and /etc/systemd/*.conf.d/.
       Those drop-ins have higher precedence and override the main
       configuration file. Files in the *.conf.d/ configuration
       subdirectories are sorted by their filename in lexicographic
       order, regardless of in which of the subdirectories they reside.
       When multiple files specify the same option, for options which
       accept just a single value, the entry in the file sorted last
       takes precedence, and for options which accept a list of values,
       entries are collected as they occur in the sorted files.

       When packages need to customize the configuration, they can
       install drop-ins under /usr/. Files in /etc/ are reserved for the
       local administrator, who may use this logic to override the
       configuration files installed by vendor packages. Drop-ins have
       to be used to override package drop-ins, since the main
       configuration file has lower precedence. It is recommended to
       prefix all filenames in those subdirectories with a two-digit
       number and a dash, to simplify the ordering of the files.

       To disable a configuration file supplied by the vendor, the
       recommended way is to place a symlink to /dev/null in the
       configuration directory in /etc/, with the same filename as the
       vendor configuration file.

OPTIONS         top

       All options are configured in the [Coredump] section:

           Controls where to store cores. One of "none", "external", and
           "journal". When "none", the core dumps may be logged
           (including the backtrace if possible), but not stored
           permanently. When "external" (the default), cores will be
           stored in /var/lib/systemd/coredump/. When "journal", cores
           will be stored in the journal and rotated following normal
           journal rotation patterns.

           When cores are stored in the journal, they might be
           compressed following journal compression settings, see
           journald.conf(5). When cores are stored externally, they will
           be compressed by default, see below.

           Controls compression for external storage. Takes a boolean
           argument, which defaults to "yes".

           The maximum size in bytes of a core which will be processed.
           Core dumps exceeding this size may be stored, but the
           backtrace will not be generated. Like other sizes in this
           same config file, the usual suffixes to the base of 1024 are
           allowed (B, K, M, G, T, P, and E).

           Setting Storage=none and ProcessSizeMax=0 disables all
           coredump handling except for a log entry.

       ExternalSizeMax=, JournalSizeMax=
           The maximum (compressed or uncompressed) size in bytes of a
           core to be saved. Unit suffixes are allowed just as in

       MaxUse=, KeepFree=
           Enforce limits on the disk space, specified in bytes, taken
           up by externally stored core dumps. Unit suffixes are allowed
           just as in ProcessSizeMax=.  MaxUse= makes sure that old core
           dumps are removed as soon as the total disk space taken up by
           core dumps grows beyond this limit (defaults to 10% of the
           total disk size).  KeepFree= controls how much disk space to
           keep free at least (defaults to 15% of the total disk size).
           Note that the disk space used by core dumps might temporarily
           exceed these limits while core dumps are processed. Note that
           old core dumps are also removed based on time via
           systemd-tmpfiles(8). Set either value to 0 to turn off
           size-based cleanup.

       The defaults for all values are listed as comments in the
       template /etc/systemd/coredump.conf file that is installed by

SEE ALSO         top

       systemd-journald.service(8), coredumpctl(1), systemd-tmpfiles(8)

COLOPHON         top

       This page is part of the systemd (systemd system and service
       manager) project.  Information about the project can be found at
       ⟨⟩.  If you have
       a bug report for this manual page, see
       This page was obtained from the project's upstream Git repository
       ⟨⟩ on 2021-08-27.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2021-08-27.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
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       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

systemd 249                                             COREDUMP.CONF(5)

Pages that refer to this page: coredumpctl(1)systemd-coredump(8)