This is the command coredumpctl that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
coredumpctl - Retrieve coredumps from the journal
SYNOPSIS
coredumpctl [OPTIONS...] {COMMAND} [PID|COMM|EXE|MATCH...]
DESCRIPTION
coredumpctl may be used to retrieve coredumps from systemd-journald(8).
OPTIONS
The following options are understood:
--no-legend
Do not print column headers.
-1
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.
--version
Print a short version string and exit.
--no-pager
Do not pipe output into a pager.
The following commands are understood:
list
List coredumps captured in the journal matching specified characteristics. If no
command is specified, this is the implied default.
info
Show detailed information about coredumps captured in the journal.
dump
Extract the last coredump matching specified characteristics. The coredump will be
written on standard output, unless an output file is specified with --output=.
gdb
Invoke the GNU debugger on the last coredump 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 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.
EXAMPLES
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
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