lttng-destroy(1) — Linux manual page


LTTNG-DESTROY(1)              LTTng Manual              LTTNG-DESTROY(1)

NAME         top

       lttng-destroy - Destroy an LTTng tracing session

SYNOPSIS         top

       lttng [GENERAL OPTIONS] destroy [--no-wait] [--all | SESSION]

DESCRIPTION         top

       The lttng destroy command destroys one or more tracing sessions.

       If no options are specified, the current tracing session is
       destroyed (see lttng-create(1) for more information about the
       current tracing session).

       If SESSION is specified, the existing tracing session named
       SESSION is destroyed. lttng list outputs all the existing tracing
       sessions (see lttng-list(1)).

       If the --all option is used, all the tracing sessions, as listed
       in the output of lttng list, are destroyed.

       Destroying a tracing session stops any tracing running within the
       latter. By default, the implicit lttng-stop(1) command invoked by
       the lttng destroy command ensures that the tracing session’s
       trace data is valid before returning. With the --no-wait option,
       the lttng-stop(1) command finishes immediately, hence a local
       trace might not be valid when the command is done. In this case,
       there is no way to know when the trace becomes valid.

       Destroying a tracing session does not destroy the recorded trace
       data, if any; it frees resources acquired by the session daemon
       and tracer side, making sure to flush all trace data.

       If at least one rotation occurred during the chosen tracing
       session’s lifetime (see lttng-rotate(1) and
       lttng-enable-rotation(1)), and without the --no-wait option, all
       the tracing session’s output directory’s subdirectories are
       considered trace chunk archives once the command returns: it is
       safe to read them, modify them, move them, or remove them.

OPTIONS         top

       General options are described in lttng(1).

       -a, --all
           Destroy all tracing sessions.

       -n, --no-wait
           Do not ensure that the chosen tracing session’s trace data is
           valid before returning to the prompt.

   Program information
       -h, --help
           Show command help.

           This option, like lttng-help(1), attempts to launch
           /usr/bin/man to view the command’s man page. The path to the
           man pager can be overridden by the LTTNG_MAN_BIN_PATH
           environment variable.

           List available command options.


           Set to 1 to abort the process after the first error is

           Overrides the $HOME environment variable. Useful when the
           user running the commands has a non-writable home directory.

           Absolute path to the man pager to use for viewing help
           information about LTTng commands (using lttng-help(1) or
           lttng COMMAND --help).

           Path in which the session.xsd session configuration XML
           schema may be found.

           Full session daemon binary path.

           The --sessiond-path option has precedence over this
           environment variable.

       Note that the lttng-create(1) command can spawn an LTTng session
       daemon automatically if none is running. See lttng-sessiond(8)
       for the environment variables influencing the execution of the
       session daemon.

FILES         top

           User LTTng runtime configuration.

           This is where the per-user current tracing session is stored
           between executions of lttng(1). The current tracing session
           can be set with lttng-set-session(1). See lttng-create(1) for
           more information about tracing sessions.

           Default output directory of LTTng traces. This can be
           overridden with the --output option of the lttng-create(1)

           User LTTng runtime and configuration directory.

           Default location of saved user tracing sessions (see
           lttng-save(1) and lttng-load(1)).

           System-wide location of saved tracing sessions (see
           lttng-save(1) and lttng-load(1)).


           $LTTNG_HOME defaults to $HOME when not explicitly set.

EXIT STATUS         top


           Command error

           Undefined command

           Fatal error

           Command warning (something went wrong during the command)

BUGS         top

       If you encounter any issue or usability problem, please report it
       on the LTTng bug tracker <

RESOURCES         top

       •   LTTng project website <>

       •   LTTng documentation <>

       •   Git repositories <>

       •   GitHub organization <>

       •   Continuous integration <>

       •   Mailing list <> for support and

       •   IRC channel <irc://>: #lttng on

COPYRIGHTS         top

       This program is part of the LTTng-tools project.

       LTTng-tools is distributed under the GNU General Public License
       version 2 <
       licenses/gpl-2.0.en.html>. See the LICENSE
       <> file
       for details.

THANKS         top

       Special thanks to Michel Dagenais and the DORSAL laboratory
       <> at École Polytechnique de
       Montréal for the LTTng journey.

       Also thanks to the Ericsson teams working on tracing which helped
       us greatly with detailed bug reports and unusual test cases.

AUTHORS         top

       LTTng-tools was originally written by Mathieu Desnoyers, Julien
       Desfossez, and David Goulet. More people have since contributed
       to it.

       LTTng-tools is currently maintained by Jérémie Galarneau

SEE ALSO         top

       lttng-create(1), lttng-set-session(1), lttng(1)

COLOPHON         top

       This page is part of the LTTng-Tools (    LTTng tools) project.
       Information about the project can be found at 
       ⟨⟩.  It is not known how to report bugs for this
       man page; if you know, please send a mail to
       This page was obtained from the project's upstream Git repository
       ⟨git://⟩ on 2019-11-19.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2019-11-14.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
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       (which is not part of the original manual page), send a mail to

LTTng 2.12.0-pre               10/29/2018               LTTNG-DESTROY(1)

Pages that refer to this page: lttng(1)lttng-create(1)lttng-set-session(1)lttng-stop(1)