lttng-start(1)
==============
:revdate: 14 June 2021


NAME
----
lttng-start - Start an LTTng recording session


SYNOPSIS
--------
[verse]
*lttng* ['linkgenoptions:(GENERAL OPTIONS)'] *start* [option::--all | option::--glob 'SESSION' | 'SESSION' ]


DESCRIPTION
-----------
The `lttng start` command starts a recording session, that is, it
activates the LTTng tracers for:

With the 'SESSION' argument::
    The recording session named 'SESSION'.

Without the 'SESSION' argument::
    The current recording session (see man:lttng-concepts(7) to learn
    more about the current recording session).

See man:lttng-concepts(7) to learn more about recording sessions.

The selected recording session must be inactive (stopped). A recording
session is inactive on creation (see man:lttng-create(1)).

A `start-session` trigger action can also start a recording session
(see man:lttng-add-trigger(1)).

See the ``<<examples,EXAMPLES>>'' section below for usage examples.

Stop an active recording session with the man:lttng-stop(1) command.


include::common-lttng-cmd-options-head.txt[]


include::common-lttng-cmd-help-options.txt[]

option:-a, option:--all::
    Start all sessions.

option:-g, option:--glob::
    Interpret SESSION as a globbing pattern.

include::common-lttng-cmd-after-options.txt[]


[[examples]]
EXAMPLES
--------
.Start the current recording session.
====
[role="term"]
----
$ lttng start
----
====

.Start a specific recording session.
====
[role="term"]
----
$ lttng start my-session
----
====

.Start all sessions.
====
See the option::--all option.

[role="term"]
----
$ lttng start --all
----
====

.Start all sessions with the suffix foo.
====
See the option::--glob option.

[role="term"]
----
$ lttng start --glob '*foo'
----
====


include::common-footer.txt[]


SEE ALSO
--------
man:lttng(1),
man:lttng-add-trigger(1),
man:lttng-create(1),
man:lttng-enable-event(1),
man:lttng-stop(1),
man:lttng-concepts(7)