COREDUMPCTL(1)

  .SH "NAME" coredumpctl - Retrieve and process saved core dumps and metadata
  .SH "SYNOPSIS"
    .HP u
      coredumpctl
       [OPTIONS...]
       {COMMAND}
       [PID|COMM|EXE|MATCH...]

  .SH "DESCRIPTION"

    .PP coredumpctl is a tool that can be used to retrieve and process core dumps and metadata which were saved by systemd-coredump(8).

  .SH "OPTIONS"

    .PP The following options are understood:

      .PP -h, --help

          Print a short help text and exit.
      .RE
          .PP --version

              Print a short version string and exit.

          .RE
              .PP --no-legend

                    Do not print column headers.
                  .RE
                  .PP --no-pager

                      Do not pipe output into a pager.

                  .RE
                      .PP -1

                            Show information of a single core dump only, instead of listing all known core dumps.
                          .RE
                          .PP -S, --since

                                Only print entries which are since the specified date.
                              .RE
                              .PP -U, --until

                                    Only print entries which are until the specified date.
                                  .RE
                                  .PP -r, --reverse

                                        Reverse output so that the newest entries are displayed first.
                                      .RE
                                      .PP -F FIELD, --field=FIELD

                                            Print all possible data values the specified field takes in matching core dump entries of the journal.
                                          .RE
                                          .PP -o FILE, --output=FILE

                                                Write the core to FILE.
                                              .RE
                                              .PP --debugger=DEBUGGER

                                                    Use the given debugger for the debug command. If not given and $SYSTEMD_DEBUGGER is unset, then gdb(1) will be used.
                                                  .RE
                                                  .PP -D DIR, --directory=DIR

                                                        Use the journal files in the specified DIR.
                                                      .RE
                                                      .PP -q, --quiet

                                                            Suppresses informational messages about lack of access to journal files and possible in-flight coredumps.
                                                          .RE

                                                      .SH "COMMANDS"

                                                        .PP The following commands are understood:

                                                          .PP list

                                                                List core dumps captured in the journal matching specified characteristics. If no command is specified, this is the implied default.

                                                                The output is designed to be human readable and contains list contains a table with the following columns:

                                                                  .PP TIME

                                                                        The timestamp of the crash, as reported by the kernel.

                                                                      .RE
                                                                      .PP PID

                                                                            The identifier of the process that crashed.

                                                                          .RE
                                                                          .PP UID, GID

                                                                                The user and group identifiers of the process that crashed.

                                                                              .RE
                                                                              .PP SIGNAL

                                                                                    The signal that caused the process to crash, when applicable.
                                                                                  .RE
                                                                                  .PP COREFILE

                                                                                        Information whether the coredump was stored, and whether it is still accessible: none means the core was not stored, - means that it was not available (for example because the process was not terminated by a signal), present means that the core file is accessible by the current user, journal means that the core was stored in the journal, truncated is the same as one of the previous two, but the core was too large and was not stored in its entirety, error means that the core file cannot be accessed, most likely because of insufficient permissions, and missing means that the core was stored in a file, but this file has since been removed.
                                                                                      .RE
                                                                                      .PP EXE

                                                                                            The full path to the executable. For backtraces of scripts this is the name of the interpreter.
                                                                                          .RE
                                                                                        .sp
                                                                                        It's worth noting that different restrictions apply to data saved in the journal and core dump files saved in /var/lib/systemd/coredump, see overview in systemd-coredump(8). Thus it may very well happen that a particular core dump is still listed in the journal while its corresponding core dump file has already been removed.
                                                                                      .RE
                                                                                      .PP info

                                                                                            Show detailed information about the last core dump or core dumps matching specified characteristics captured in the journal.
                                                                                          .RE
                                                                                          .PP dump

                                                                                                Extract the last core dump matching specified characteristics. The core dump will be written on standard output, unless an output file is specified with --output=.
                                                                                              .RE
                                                                                              .PP debug

                                                                                                    Invoke a debugger on the last core dump matching specified characteristics. By default, gdb(1) will be used. This may be changed using the --debugger= option or the $SYSTEMD_DEBUGGER environment variable.
                                                                                                  .RE

                                                                                              .SH "MATCHING"

                                                                                                .PP A match can be:

                                                                                                  .PP PID

                                                                                                        Process ID of the process that dumped core. An integer.
                                                                                                      .RE
                                                                                                      .PP COMM

                                                                                                            Name of the executable (matches COREDUMP_COMM=). Must not contain slashes.
                                                                                                          .RE
                                                                                                          .PP EXE

                                                                                                                Path to the executable (matches COREDUMP_EXE=). Must contain at least one slash.
                                                                                                              .RE
                                                                                                              .PP MATCH

                                                                                                                    General journalctl match filter, must contain an equals sign (=). See journalctl(1).
                                                                                                                  .RE

                                                                                                              .SH "EXIT STATUS"

                                                                                                                .PP On success, 0 is returned; otherwise, a non-zero failure code is returned. Not finding any matching core dumps is treated as failure.

                                                                                                              .SH "ENVIRONMENT"

                                                                                                                  .PP $SYSTEMD_DEBUGGER

                                                                                                                        Use the given debugger for the debug command. See the --debugger= option.
                                                                                                                      .RE

                                                                                                                  .SH "EXAMPLES"

                                                                                                                    .PP Example 1. List all the core dumps of a program named foo

                                                                                                                    # coredumpctl list foo

                                                                                                                    .PP Example 2. Invoke gdb on the last core dump

                                                                                                                    # coredumpctl debug

                                                                                                                    .PP Example 3. Show information about a process that dumped core, matching by its PID 6654

                                                                                                                    # coredumpctl info 6654

                                                                                                                    .PP Example 4. Extract the last core dump of /usr/bin/bar to a file named bar.coredump

                                                                                                                    # coredumpctl -o bar.coredump dump /usr/bin/bar

                                                                                                                  .SH "SEE ALSO"

                                                                                                                    .PP systemd-coredump(8), coredump.conf(5), systemd-journald.service(8), gdb(1)