Index · Directives systemd 228


coredumpctl — Retrieve coredumps from the journal


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


coredumpctl may be used to retrieve coredumps from systemd-journald(8).


The following options are understood:


Do not print column headers.


Show information of a single coredump only, instead of listing all known coredumps.

-F FIELD, --field=FIELD

Print all possible data values the specified field takes in matching coredump 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.

-h, --help

Print a short help text and exit.


Print a short version string and exit.


Do not pipe output into a pager.

The following commands are understood:


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


Show detailed information about coredumps captured in the journal.


Extract the last coredump matching specified characteristics. The coredump will be written on standard output, unless an output file is specified with --output=.


Invoke the GNU debugger on the last coredump matching specified characteristics.


A match can be:


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


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


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


General journalctl predicates (see journalctl(1)). Must contain an equal sign.

Exit status

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


Example 1. List all the coredumps of a program named foo

# coredumpctl list foo

Example 2. Invoke gdb on the last coredump

# 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 coredump 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)