[[welcome]]
== Welcome!

Welcome to the **LTTng Documentation**!

The _Linux Trace Toolkit: next generation_ is an open source software
toolkit which you can use to trace the Linux kernel, user applications,
and user libraries at the same time.

LTTng consists of:

* Kernel modules to trace the Linux kernel.
* Shared libraries to trace C/$$C++$$ user applications.
* Java packages to trace Java applications which use `java.util.logging`
  or Apache log4j 1.2.
* A Python package to trace Python applications which use the standard
  `logging` package.
* A kernel module to trace shell scripts and other user applications
  without a dedicated instrumentation mechanism.
* Daemons and a command-line tool, cmd:lttng, to control the
  LTTng tracers.

[NOTE]
.Open source documentation
====
This is an **open documentation**: its source is available in a
https://github.com/lttng/lttng-docs[public Git repository].

Should you find any error in the content of this text, any grammatical
mistake, or any dead link, we would be very grateful if you would file a
GitHub issue for it or, even better, contribute a patch to this
documentation by creating a pull request.
====