# Install lttng-ust with Homebrew, apk, dnf, Nix, pacman, zypper Linux Trace Toolkit Next Generation Userspace Tracer. Version 2.15.1 via Homebrew; verified 2026-06-15. ## Install ```sh sudo av install brew:lttng-ust ``` Additional install commands: ### macOS - Homebrew (100%): ```sh brew install lttng-ust ``` Evidence: local Homebrew formula metadata ### Linux - apk (92%): ```sh sudo apk add lttng-ust ``` Evidence: Alpine Linux edge package indexes: lttng-ust from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz - dnf (92%): ```sh sudo dnf install lttng-ust ``` Evidence: Fedora Rawhide package metadata: lttng-ust from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst - Nix (92%): ```sh nix profile install nixpkgs#lttng-ust ``` Evidence: nixpkgs package indexes: pkgs/by-name/lt/lttng-ust/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - pacman (92%): ```sh sudo pacman -S lttng-ust ``` Evidence: Arch Linux sync databases: lttng-ust from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz - zypper (92%): ```sh sudo zypper install liblttng-ust-ctl6 ``` Evidence: openSUSE Tumbleweed package metadata: liblttng-ust-ctl6 from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst ## Package facts - **Package key:** brew:lttng-ust - **Package manager:** Homebrew - **Package manager page:** - **Version:** 2.15.1 - **Source summary:** Linux Trace Toolkit Next Generation Userspace Tracer - **Homepage:** - **Repository:** - **Upstream docs:** - **License:** LGPL-2.1-only AND MIT AND GPL-2.0-only AND BSD-3-Clause AND BSD-2-Clause AND GPL-3.0-or-later - **Source archive:** - **Last updated:** 2026-06-15T17:16:33Z - **Generated:** 2026-07-08T07:18:31+00:00 ## Executables - lttng-gen-tp (cli) - lttng-gen-tp (alias) ## Dependencies - numactl - userspace-rcu ## Build dependencies - pkgconf ## Install behavior - Post-install hook: not defined - Bottle: available on arm64_linux, x86_64_linux ## Freshness - Page generated: 2026-07-08 - Package-manager version: 2.15.1 - Package-manager updated: 2026-06-15 - Local data: ok - Upstream repository: https://lttng.org/ - info: Release/tag comparison is only available for GitHub repositories. ## Project history and usage LTTng-UST is the user-space tracing component of the LTTng project. It provides libraries and agents that let C, C++, Java, Python, and other user applications emit events into LTTng traces, complementing the LTTng kernel tracer and LTTng-tools control utilities. ### Project history LTTng, short for Linux Trace Toolkit: next generation, grew out of the Linux tracing work associated with Mathieu Desnoyers and the Polytechnique Montreal/EfficiOS ecosystem. Official LTTng publications list papers and talks from the mid-2000s onward, including 2006 work on low-impact GNU/Linux tracing, 2008 work on tracing across hypervisor-to-user-space execution layers, and 2009 work on combining kernel and application tracing. The LTTng documentation presents LTTng as a toolkit made of separate but coordinated components: LTTng-tools for control, LTTng-modules for kernel instrumentation, and LTTng-UST for user-space instrumentation. LTTng-UST specifically contains shared libraries for C/C++ user applications, Java and Python tracing support, and user-space helpers, all designed to record low-overhead traces that can be correlated with kernel events. ### Adoption history LTTng-UST became important because full-system performance debugging often needs both sides of the user/kernel boundary. The official documentation emphasizes correlated kernel, user application, and user library tracing, plus low overhead and production suitability. The supplied package-manager facts show broad distribution packaging across Homebrew, apk, dnf, Nix, pacman, and zypper, which matches the official claim that LTTng is available on major desktop, server, and embedded Linux distributions. The LTTng 2.x series also made LTTng-UST a separately versioned package that tracks the same minor release series as the rest of LTTng. The official download page lists current release archives and Git clone URLs for lttng-tools, lttng-ust, and lttng-modules, and notes that applications instrumented with older LTTng-UST versions do not need to be rebuilt for newer LTTng-tools. ### How it is used Developers use LTTng-UST by linking applications against liblttng-ust or by loading user-space tracing helpers. The man page documents three main paths: printf-like tracef APIs, log-level tracelog APIs, and custom tracepoint providers. In normal workflows LTTng-tools controls sessions, enables user-space events, records traces, and hands trace data to viewers such as Babeltrace. The package matters most for performance investigations, production diagnostics, embedded Linux tracing, and situations where logging is either too high level or too expensive. It is not a configuration-file-driven command-line app; it is a library and instrumentation toolkit, so no credentials or persistent user config path is part of the package identity. ### Why package nerds care LTTng-UST is a classic packaging dependency for serious Linux observability stacks: it is not only an executable, but a set of ABI-sensitive libraries that other instrumented software links against. Package managers care about it because version compatibility with LTTng-tools, liburcu, optional agents, and distribution library paths directly affects whether traces can be recorded in production. ### Timeline - 2006: Official publications list LTTng work on low-impact GNU/Linux tracing. - 2009: Official publications include combined kernel and application tracing with LTTng. - 2012: LTTng 2.0 era talks presented application, library, and kernel tracing within Linux distributions. - 2026: Official documentation still presents LTTng as active open source Linux tracing infrastructure, with LTTng-UST as the user-space component. ### Related projects - LTTng-tools controls tracing sessions and enables LTTng-UST events. - LTTng-modules provides the Linux kernel tracing side of the same toolkit. - Userspace RCU is a build dependency documented by LTTng for LTTng-tools and LTTng-UST. - Babeltrace is commonly used to view or process LTTng trace data. ### Sources - - - - - - - source_facts.package-manager ## Security Notes narrow executable package without higher-risk signals. - **Geiger risk:** green / low - narrow executable package without higher-risk signals ## Source Database Details - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** lttng-ust - **Version Scheme:** 0 - **Revision:** 0 - **Requirements:** linux - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** stable ## Other Package-Manager Records - Nix - lttng-ust: normalized package name match | nixpkgs package indexes: pkgs/by-name/lt/lttng-ust/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - apk - lttng-ust - 2.14.2-r0: normalized package name match | Alpine Linux edge package indexes: lttng-ust from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | LTTng 2.0 Userspace Tracer | https://lttng.org/ - apk - lttng-ust-dev - 2.14.2-r0: normalized package name match | Alpine Linux edge package indexes: lttng-ust-dev from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | LTTng 2.0 Userspace Tracer (development files) | https://lttng.org/ - apk - lttng-ust-doc - 2.14.2-r0: normalized package name match | Alpine Linux edge package indexes: lttng-ust-doc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | LTTng 2.0 Userspace Tracer (documentation) | https://lttng.org/ - apk - lttng-ust-tools - 2.14.2-r0: normalized package name match | Alpine Linux edge package indexes: lttng-ust-tools from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | tools from lttng-ust | https://lttng.org/ - apk - py3-lttng - 2.14.2-r0: normalized package name match | Alpine Linux edge package indexes: py3-lttng from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | lttng-ust python agent | https://lttng.org/ - dnf - lttng-ust - 2.15.1-2.fc45: normalized package name match | Fedora Rawhide package metadata: lttng-ust from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst | LTTng Userspace Tracer library | https://lttng.org - dnf - lttng-ust-devel - 2.15.1-2.fc45: normalized package name match | Fedora Rawhide package metadata: lttng-ust-devel from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst | LTTng Userspace Tracer library headers and development files | https://lttng.org - dnf - python3-lttngust - 2.15.1-2.fc45: normalized package name match | Fedora Rawhide package metadata: python3-lttngust from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst | Python bindings for LTTng UST | https://lttng.org - pacman - lttng-ust - 2.15.1-1: normalized package name match | Arch Linux sync databases: lttng-ust from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz | LTTng user space tracing libraries for LTTng | https://lttng.org/ - zypper - liblttng-ust-ctl6 - 2.14.0-1.2: normalized package name match | openSUSE Tumbleweed package metadata: liblttng-ust-ctl6 from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | Linux Trace Toolkit Userspace Tracer library | https://lttng.org/ - zypper - liblttng-ust-ctl6-32bit - 2.14.0-1.2: normalized package name match | openSUSE Tumbleweed package metadata: liblttng-ust-ctl6-32bit from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | Linux Trace Toolkit Userspace Tracer library | https://lttng.org/ - zypper - liblttng-ust-python-agent1 - 2.14.0-1.2: normalized package name match | openSUSE Tumbleweed package metadata: liblttng-ust-python-agent1 from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | Linux Trace Toolkit Userspace Tracer Python agent library | https://lttng.org/ - zypper - liblttng-ust-python-agent1-32bit - 2.14.0-1.2: normalized package name match | openSUSE Tumbleweed package metadata: liblttng-ust-python-agent1-32bit from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | Linux Trace Toolkit Userspace Tracer Python agent library | https://lttng.org/ - zypper - liblttng-ust1 - 2.14.0-1.2: normalized package name match | openSUSE Tumbleweed package metadata: liblttng-ust1 from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | Linux Trace Toolkit Userspace Tracer library | https://lttng.org/ - zypper - liblttng-ust1-32bit - 2.14.0-1.2: normalized package name match | openSUSE Tumbleweed package metadata: liblttng-ust1-32bit from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst | Linux Trace Toolkit Userspace Tracer library | https://lttng.org/ ## Related links - [Terminal utility packages](https://www.automicvault.com/pkg/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Text processing packages](https://www.automicvault.com/pkg/text-processing-tools/) - Matched text, document, or structured-data processing metadata. - [Developer build packages](https://www.automicvault.com/pkg/developer-build-tools/) - Matched build, compiler, generator, or developer workflow metadata. - [Networking and protocol packages](https://www.automicvault.com/pkg/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [numactl](https://www.automicvault.com/pkg/brew/numactl/) - Runtime dependency declared by Homebrew. - [pkgconf](https://www.automicvault.com/pkg/brew/pkgconf/) - Build dependency declared by Homebrew. - [otel-cli](https://www.automicvault.com/pkg/brew/otel-cli/) - Shares av.db curated category or tags: cli, developer-tools, observability, tracing. - [uftrace](https://www.automicvault.com/pkg/brew/uftrace/) - Shares av.db curated category or tags: c, cli, developer-tools, tracing. - [zipkin](https://www.automicvault.com/pkg/brew/zipkin/) - Shares av.db curated category or tags: cli, developer-tools, observability, tracing. - [alp](https://www.automicvault.com/pkg/brew/alp/) - Shares av.db curated category or tags: cli, developer-tools, observability. - [grafana](https://www.automicvault.com/pkg/brew/grafana/) - Shares av.db curated category or tags: cli, developer-tools, observability. - [grafana-alloy](https://www.automicvault.com/pkg/brew/grafana-alloy/) - Shares av.db curated category or tags: cli, developer-tools, observability. - [grafanactl](https://www.automicvault.com/pkg/brew/grafanactl/) - Shares av.db curated category or tags: cli, developer-tools, observability. - [humanlog](https://www.automicvault.com/pkg/brew/humanlog/) - Shares av.db curated category or tags: cli, developer-tools, observability. ## Combined YAML source View the package source record on GitHub. [combined/lttng-ust.yml](https://github.com/automic-vault/db/blob/main/combined/lttng-ust.yml) ## Sources - Nucleus package database - Geiger risk classifier - package-page enrichment - curated package history - package version freshness - av.db category and tag curation - package relationship graph - external package-manager database matches - cross-ecosystem install command graph