lttng-disable-channel — Disable LTTng channels


lttng [GENERAL OPTIONS] disable-channel (--kernel | --userspace)
      [--session=SESSION] CHANNEL[,CHANNEL]...


The lttng disable-channel command disables one or more channels previously enabled by the lttng-enable-channel(1) command.

A channel is always contained in a tracing session (see lttng-create(1) for creating a tracing session). The session in which a channel is disabled using lttng disable-channel can be specified using the --session option. If the --session option is omitted, the current tracing session is targeted.

Note that re-enabling a disabled channel once its tracing session has been active at least once is currently not supported.


General options are described in lttng(1).


One of:

-k, --kernel

Disable channel in the Linux kernel domain.

-u, --userspace

Disable channel in the user space domain.


-s SESSION, --session=SESSION

Disable channels in the tracing session named SESSION instead of the current tracing session.

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.

Environment Variables


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


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.



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) command.


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




Command error


Undefined command


Fatal error


Command warning (something went wrong during the command)


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



This program is part of the LTTng-tools project.

LTTng-tools is distributed under the GNU General Public License version 2 <>. See the LICENSE <> file for details.


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.

See Also

lttng-disable-channel(1), lttng(1)

Referenced By

lttng(1), lttng-enable-channel(1).

10/17/2019 LTTng 2.11.0 LTTng Manual