man_coredumpctl

COREDUMPCTL(1)                                        coredumpctl                                       COREDUMPCTL(1)

NAME
       coredumpctl - Retrieve and process saved core dumps and metadata

SYNOPSIS
       coredumpctl [OPTIONS...] {COMMAND} [PID|COMM|EXE|MATCH...]

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

OPTIONS
       The following options are understood:

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

       --no-legend
           Do not print column headers.

       --no-pager
           Do not pipe output into a pager.

       -1
           Show information of a single core dump only, instead of listing all known core dumps.

       -S, --since
           Only print entries which are since the specified date.

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

       -r, --reverse
           Reverse output so that the newest entries are displayed first.

       -F FIELD, --field=FIELD
           Print all possible data values the specified field takes in matching core dump entries of the journal.

       -o FILE, --output=FILE
           Write the core to FILE.

       -D DIR, --directory=DIR
           Use the journal files in the specified DIR.

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

COMMANDS
       The following commands are understood:

       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:

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

           PID
               The identifier of the process that crashed.

           UID, GID
               The user and group identifiers of the process that crashed.

           SIGNAL
               The signal that caused the process to crash, when applicable.

           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.

           EXE
               The full path to the executable. For backtraces of scripts this is the name of the interpreter.

           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.

       info
           Show detailed information about core dumps captured in the journal.

       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=.

       gdb
           Invoke the GNU debugger on the last core dump matching specified characteristics.

MATCHING
       A match can be:

       PID
           Process ID of the process that dumped core. An integer.

       COMM
           Name of the executable (matches COREDUMP_COMM=). Must not contain slashes.

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

       MATCH
           General journalctl predicate (see journalctl(1)). Must contain an equals sign ("=").

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

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

           # coredumpctl list foo

       Example 2. Invoke gdb on the last core dump

           # coredumpctl gdb

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

           # coredumpctl info 6654

       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

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

systemd 238                                                                                             COREDUMPCTL(1)