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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | COMMANDS | MATCHING | EXIT STATUS | EXAMPLES | SEE ALSO | COLOPHON |
COREDUMPCTL(1) coredumpctl COREDUMPCTL(1)
coredumpctl - Retrieve and process saved core dumps and metadata
coredumpctl [OPTIONS...] {COMMAND} [PID|COMM|EXE|MATCH...]
coredumpctl is a tool that can be used to retrieve and process core
dumps and metadata which were saved by systemd-coredump(8).
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 info messages about lack of access to journal files
and possible in-flight coredumps.
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 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.
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 ("=").
On success, 0 is returned; otherwise, a non-zero failure code is
returned. Not finding any matching core dumps is treated as failure.
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
systemd-coredump(8), coredump.conf(5), systemd-journald.service(8),
gdb(1)
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This
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COLOPHON (which is not part of the original manual page), send a mail
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systemd 234 COREDUMPCTL(1)
Pages that refer to this page: journalctl(1), coredump.conf(5), systemd.directives(7), systemd.index(7), systemd.journal-fields(7), systemd-coredump(8)