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.

   -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.

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.

       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 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 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)

Opportunity

Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.

Education

Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.