Ubuntu 24.04 LTS Developer Review: Toolchain Caught Up [2026]

Ubuntu 24.04 LTS (Long Term Support), codenamed Noble Numbat, is Canonical's 10th LTS release and the first to ship a developer toolchain that doesn't immediately need replacing. This Ubuntu 24.04 LTS developer review covers what actually changed under the hood — the compilers, runtimes, kernel, and container stack — not GNOME screenshots. With Ubuntu 26.04 LTS now released as of April 2026 and Ubuntu 24.04.4 landing in February 2026, developers on 22.04 face a concrete migration decision right now.

Key takeaways:

• Ubuntu 24.04 LTS ships GCC 13.2, Python 3.12.3, Go 1.22, Rust 1.75, and Linux kernel 6.8 — every major toolchain component jumped at least one full generation from 22.04.
• Frame pointers are enabled by default on all 64-bit architectures for the first time in any Ubuntu LTS, making flame graphs accurate without recompilation.
• cgroup v2 is the default and only cgroup mode, which breaks some older Docker Compose v1 workflows but enables rootless containers and better resource isolation.
• The 2026 decision is real: with Ubuntu 26.04 released, most teams should migrate to 24.04 now rather than waiting, unless their stack has hard dependencies on packages only in 26.04.
• Support runs until May 2029 standard, May 2034 with Ubuntu Pro (free for up to 5 machines).

Ubuntu 24.04 is the first LTS where the default toolchain doesn't need replacing on day one.

What Ships in the Ubuntu 24.04 LTS Developer Toolchain

Every Ubuntu LTS review talks about the desktop. Here's what developers actually care about: the version numbers.

That table tells the story. Every single row is a meaningful jump. Python went from 3.10 (already showing its age with f-string limitations and missing performance work) to 3.12.3, which brings roughly 5% CPython benchmark speedups, multi-line f-string expressions, and substantially better error messages. GCC 13.2 brings improved C++20/23 support and better optimization passes. Go 1.22 includes the new for loop variable scoping that eliminates an entire class of goroutine bugs.

The Rust jump from 1.61 to 1.75 is 14 point releases — that's async trait stabilization, improved const generics, and better compile times. For teams writing CLI tools or system utilities in Rust, this is no longer a "install rustup immediately" situation.

When I maintain the LLM pricing tracker and various developer tools on this site, Python version compatibility is one of the first things I check on any new server. Python 3.12's improved error messages alone save real debugging time — the tracebacks now point to the exact expression that failed, not just the line.

→ Related: Docker vs Podman 2026: Which Container Runtime Should You Use?

Linux Kernel 6.8: EEVDF Scheduler, io_uring, and What It Means for Your Code

The kernel jump from 5.15 to 6.8 is the single biggest upgrade in this LTS cycle. It spans 93 minor kernel versions and introduces changes that affect how your applications schedule, do I/O, and get profiled.

The EEVDF scheduler replaces CFS. The Earliest Eligible Virtual Deadline First (EEVDF) scheduler is the most significant CPU scheduling change in Linux in over a decade. CFS (Completely Fair Scheduler) optimized for fairness. EEVDF optimizes for latency-sensitivity by assigning virtual deadlines to tasks, which means interactive and latency-critical workloads get better treatment without manual nice tuning. If you run mixed workloads — say, a dev server alongside a build process — you'll notice the difference.

io_uring improvements. Kernel 6.8 continues the io_uring maturation story with better buffer management and reduced syscall overhead for async I/O. If you're running database workloads or high-throughput network services, the io_uring path is now meaningfully faster than the epoll path for many patterns.

Nested KVM on ppc64el and access to the newly landed bcachefs filesystem are niche but important for specific workloads. bcachefs in particular is worth watching — it's a modern copy-on-write filesystem that could eventually challenge ZFS and Btrfs for server use cases, though it's still marked experimental.

For developers building local AI inference servers or running containerized workloads, the kernel 6.8 improvements to memory management and cgroup handling translate directly to more predictable performance under load. I've written about how Linux is the best OS for local AI workloads and kernel 6.8 only widens that gap.

Python 3.12, GCC 13, Go 1.22, Rust 1.75 — The Language Runtime Upgrades

Let me break down what each language upgrade actually means for day-to-day work.

Python 3.12.3 is the default, and python3 points to it. The upgrade from 3.10 brings two releases' worth of improvements:

• ~5% faster CPython execution according to the CPython benchmark suite
• Per-interpreter GIL groundwork (PEP 684), setting up true multi-core Python in future versions
• Multi-line f-string expressions — you can finally nest quotes and expressions without escaping
• Dramatically better error messages with exact expression highlighting
• tomllib in the standard library (no more pip install tomli for config parsing)

The catch: some older packages that use deprecated C APIs break on 3.12. If your project pins numpy<1.24 or old versions of scikit-learn, expect compilation failures. Test your requirements.txt before upgrading the OS.

For anyone following the Python AI development setup guide I wrote, Python 3.12 on 24.04 is a solid base. The combination of uv as your package manager and Python 3.12 as your runtime eliminates most of the friction that plagued earlier Ubuntu LTS Python setups.

GCC 13.2 (with 14.2 available in universe) brings improved auto-vectorization, better link-time optimization, and stronger C++20 module support. If you're compiling C/C++ projects — and many developer tools like llama.cpp need local compilation — the performance improvement from GCC 13's optimizer is measurable. Based on the benchmark data I maintain at kunalganglani.com/llm-benchmarks, llama.cpp compiled with GCC 13 on kernel 6.8 shows consistent throughput improvements over the same code compiled with GCC 11 on kernel 5.15.

Go 1.22 fixes the infamous loop variable scoping bug that caused countless goroutine-related production issues. Variables declared in for loops are now per-iteration by default. If you write Go professionally, this alone justifies the upgrade.

Rust 1.75 stabilizes async fn in traits, which was one of the last major gaps in Rust's async story. Combined with improved compile times, Rust on 24.04 is finally production-friendly without immediately reaching for rustup.

Node.js, Java, .NET — The Rest of the Runtime Story

Ubuntu 24.04 ships Node.js 18.19.1 in the universe repository. This is a massive jump from the ancient Node.js 12.22 that shipped with 22.04. Node 18 is an LTS release with native fetch, a built-in test runner, and the --watch flag. It's usable out of the box for most projects.

That said, Node.js 18 entered end-of-life in April 2025. If you're starting new projects, you'll want Node 20 or 22 via NodeSource or nvm/fnm. The Ubuntu-packaged Node is fine for build tooling and scripts, but production apps should use a more current version. The snap-packaged Node (snap install node) is an option but introduces filesystem sandboxing that breaks some native modules. My recommendation: use fnm (Fast Node Manager) and skip both snap and apt for Node.

Java gets a real upgrade. Ubuntu 24.04 ships OpenJDK 21, which is the current Java LTS, and it's TCK certified — meaning it passes the official Java compatibility test suite. Mark Shuttleworth, CEO of Canonical, specifically highlighted this: "For developers we are delighted to announce TCK certified Java, an LTS for .NET and the latest Rust toolchain." This matters for enterprise Java shops that need certified runtimes for compliance.

.NET 8.0 LTS is officially supported on Ubuntu 24.04, making it the first Ubuntu LTS to ship with a supported .NET LTS track. For the growing number of C# developers on Linux — especially those building microservices — this removes a friction point that previously required adding Microsoft's apt repository manually.

Container Stack: cgroup v2, Docker, Podman, and Rootless Containers

This is where the upgrade gets interesting — and where most reviews completely miss the story.

Ubuntu 24.04 defaults to cgroup v2 exclusively. Ubuntu 22.04 used a hybrid cgroup v1/v2 setup. The move to pure v2 has real consequences:

Docker works fine — but only if you're on Docker Engine 20.10+ (which you should be). Older Docker versions that relied on cgroup v1 hierarchies will break. Docker Compose v1 (the Python-based docker-compose) is effectively dead on 24.04. You need Compose v2 (the Go-based docker compose plugin). If your CI/CD pipelines still reference docker-compose as a standalone binary, they'll fail silently or explicitly.

Rootless containers become first-class. cgroup v2 enables proper resource delegation to unprivileged users, which means rootless Docker and rootless Podman actually work reliably. On 22.04's hybrid cgroup setup, rootless containers were technically possible but flaky — resource limits didn't propagate correctly, and some systemd interactions were broken. On 24.04, rootless is the recommended path for development machines.

Podman 4.x is available in the repositories and works natively with cgroup v2. If you're evaluating Docker alternatives for local development, Podman on 24.04 is substantially more reliable than on 22.04.

[Kubernetes](/glossary/kubernetes) note: If you run local k8s clusters with kind or minikube, the cgroup v2 transition is transparent — both tools handle it. But if you're running kubelet directly, confirm your container runtime is cgroup v2-aware.

I've written about Linux container security before, and cgroup v2's unified hierarchy is a meaningful security improvement. Resource limits, memory accounting, and device access controls are all in one place, eliminating the split-brain problems that plagued cgroup v1 hybrid mode.

Performance Engineering Out of the Box: Frame Pointers, bpftrace, and Low-Latency Kernel

This is the section where Ubuntu 24.04 genuinely differentiates itself from every previous LTS. Canonical made three decisions that collectively transform the performance engineering story.

Frame pointers enabled by default on all 64-bit architectures. This is a first for any mainstream Ubuntu LTS. Brendan Gregg, Computer Performance Expert and Fellow at Intel, put it clearly: "Frame pointers allow more complete CPU profiling and off-CPU profiling. The performance wins that these can provide far outweigh the comparatively tiny loss in performance. Ubuntu enabling frame pointers by default will be a huge win for performance engineering and the default developer experience."

What does this mean practically? When you run perf record on a 24.04 system, your flame graphs will show complete stack traces by default. On 22.04, frame pointers were compiled out for a marginal (~1-2%) performance gain, which meant perf and similar tools produced broken or incomplete stacks unless you recompiled your software. This was a terrible tradeoff for anyone doing performance work.

bpftrace ships pre-installed. On 22.04 you had to apt install bpftrace and deal with kernel header dependencies. On 24.04, eBPF-based tracing is available immediately. You can write one-liner traces against syscalls, function calls, and kernel events without any setup. For SRE teams debugging production latency, this eliminates the "I need to install tools before I can diagnose the problem" delay.

Low-latency kernel features merged into the default kernel. Previously, getting reduced scheduling latency required installing the linux-lowlatency package, which was a separate kernel with different update cadence. Ubuntu 24.04 merges these features into the default kernel, meaning every installation gets the benefit without maintaining a separate kernel package.

As someone who writes hardware benchmark guides for this site, I can confirm that the combination of frame pointers and bpftrace makes profiling local LLM inference workloads dramatically easier. No more recompiling llama.cpp with -fno-omit-frame-pointer just to get a readable flame graph.

AI/ML Developer Toolchain: CUDA, ROCm, Python 3.12 Compatibility

If you're doing AI/ML work on Ubuntu — and the majority of ML engineers are — here's what you need to know about 24.04.

Python 3.12 compatibility is solid now. When 24.04 first launched in April 2024, PyTorch and TensorFlow had rocky Python 3.12 support. As of mid-2025, PyTorch 2.3+ and TensorFlow 2.16+ both fully support 3.12. The pip install torch experience works cleanly. NumPy 2.0, which broke many downstream packages, has stabilized and most of the scientific Python stack has caught up.

NVIDIA CUDA on kernel 6.8 works with CUDA 12.4+ and the 550+ driver series. If you're on an older CUDA version, you'll need to upgrade. The good news is that NVIDIA's official Ubuntu 24.04 repository is actively maintained, and cuda-toolkit-12-4 installs cleanly. For developers running local LLM inference, the CUDA + kernel 6.8 combination is now the standard production path.

AMD [ROCm](/blog/amd-rocm-vs-cuda-local-ai-open-source-guide) support on 24.04 has improved significantly. ROCm 6.0+ officially supports Ubuntu 24.04, and PyTorch ships ROCm-compatible wheels. If you're running an RX 7900 XTX or other RDNA3 GPU, 24.04 is a better base than 22.04 was. I've covered the ROCm vs CUDA comparison in depth — kernel 6.8's improved AMD GPU driver support narrows the gap further.

From maintaining the local LLM benchmark database on this site, one pattern is clear: quantization quality cliffs are model-family-specific, and a blanket Q4 recommendation is wrong. But OS-level compatibility is no longer the bottleneck — on 24.04, the ML stack installs and runs with far fewer dependency conflicts than on 22.04.

Ollama, LM Studio, and llama.cpp all run natively on 24.04 without issues. If you're following the local AI setup guides on this site, 24.04 is the recommended base OS.

Sharp Edges: Upgrade Gotchas, Netplan, Firewall Changes, and Snap Conflicts

No LTS upgrade is pain-free. Here are the sharp edges that will bite you if you're migrating from 22.04.

Netplan is mandatory. Ubuntu 24.04 fully commits to Netplan as the network configuration layer. If you had hand-edited /etc/network/interfaces files on 22.04 (common on servers), those configurations won't carry over cleanly. You need to convert them to Netplan YAML files in /etc/netplan/. This is the single most common upgrade failure I've seen reported for server migrations. Test your network config in a VM before upgrading production boxes.

Firewall backend changed. UFW (Uncomplicated Firewall) now uses nftables as its backend instead of iptables. Your existing UFW rules should migrate automatically, but if you had raw iptables rules outside of UFW, they may not work. Any scripts that call iptables directly should be tested — the iptables command still exists but is now a compatibility shim over nftables.

Snap vs apt conflicts are real. Ubuntu 24.04 defaults to snap for Firefox and some other packages. For developers, the main friction points are:

• Snap Firefox can't access files outside your home directory without manual permission grants
• Snap-packaged Node.js has filesystem sandboxing that breaks native module compilation
• Some snap packages conflict with apt-installed versions of the same tool
• The python3-pip package enforces PEP 668 (externally managed environments), which means pip install outside a venv will fail. Use virtual environments or uv.

The PEP 668 change trips up almost every developer on first encounter. Running pip install requests gives you an error telling you to use a virtual environment instead. This is actually the right behavior — system Python packages and pip packages shouldn't mix — but it's a jarring change if you're used to 22.04's permissive approach.

OpenSSH configuration changes. Ubuntu 24.04 ships OpenSSH 9.6, which disables some older key exchange algorithms by default. If you SSH into legacy servers with older OpenSSH versions, you may need to explicitly enable older algorithms in your ~/.ssh/config.

Having built CLI developer tools for SOC 2-compliant project scaffolding at Rise People, I learned that compliance baked into scaffolding beats compliance review at PR time. The same principle applies here: 24.04's stricter defaults (PEP 668, nftables, Netplan) are better architecture even though they create upgrade friction.

Should You Upgrade from 22.04 Now — or Wait for 26.04 LTS?

This is the question every developer still on 22.04 is asking in 2026. Ubuntu 26.04 LTS (Plucky Puffin) shipped in April 2026. So the decision is now three-way: stay on 22.04, migrate to 24.04, or jump to 26.04.

Here's my framework:

Migrate to 24.04 now if:

1. You're running production servers — 24.04 has had two years of point releases (24.04.4 landed February 2026) and is battle-tested. 26.04 is brand new and hasn't had its first point release yet.
2. Your stack is Python, Go, Rust, or Java-heavy — the toolchain is current and stable.
3. You need cgroup v2, rootless containers, or the performance engineering tools (frame pointers, bpftrace).
4. You want 12 years of total support runway with Ubuntu Pro.

Consider jumping to 26.04 if:

1. You're setting up new infrastructure from scratch (no migration cost).
2. You need packages that are only in 26.04's repositories (newer GCC, newer Python, newer kernel).
3. You're comfortable running a freshly released LTS that hasn't been through a full point-release cycle yet.

Stay on 22.04 only if:

1. You have hard dependencies on cgroup v1 (legacy Docker setups, older Kubernetes versions).
2. Your Python codebase can't handle 3.12 yet (but seriously, fix that).
3. You have regulatory requirements that demand waiting for a specific certification timeline.

Ubuntu 22.04 gets standard security maintenance until April 2027, so you're not in emergency territory. But every month you wait increases the eventual migration cost as your 22.04-specific configurations accumulate.

The upgrade path from 22.04 to 24.04 is well-tested. The path from 22.04 directly to 26.04 requires going through 24.04 first (Ubuntu doesn't support skipping LTS versions in the upgrade path). So if you know you'll end up on 26.04 eventually, migrating to 24.04 now gets you halfway there.

Ubuntu 24.04 LTS Support Timeline

The support story for Ubuntu 24.04 LTS is the longest Canonical has ever offered:

• Standard Security Maintenance: until May 2029 (5 years)
• Expanded Security Maintenance (Ubuntu Pro): until May 2034 (10 years total)
• Legacy Support (Ubuntu Pro add-on): until May 2039 (15 years total)

Ubuntu Pro is free for personal use on up to 5 machines, which covers most individual developers. For organizations, Ubuntu Pro pricing starts at $25/year per desktop.

The 24.04.4 point release (February 12, 2026) confirms active maintenance with the latest hardware enablement stack and security patches. Point releases are essentially updated ISOs — if you're already on 24.04 and running apt upgrade, you're already current.

For comparison, Ubuntu 22.04 standard support runs until April 2027. That's roughly 10 months away as of this writing. If you're on 22.04 without Ubuntu Pro, the clock is ticking.

Is Ubuntu 24.04 Good for Developers? The Bottom Line

Ubuntu 24.04 LTS is the best Ubuntu for developers that Canonical has shipped. That's not a vague compliment — it's backed by specific toolchain jumps across every major language, a kernel that respects performance engineers, and a container stack that's finally cgroup v2-native.

The competitors' reviews focus on GNOME 46 and the Flutter installer. Those things don't matter if you spend your day in a terminal. What matters is whether gcc, python3, go, rustc, docker, and perf do the right thing out of the box. On 24.04, they do.

The sharp edges are real — Netplan migration, PEP 668 enforcement, nftables backend, snap conflicts — but they're the kind of friction that comes from enforcing better defaults. Every one of those changes is architecturally correct even if it causes upgrade pain.

With Ubuntu 26.04 now available, 24.04 occupies the "proven and stable" position in the LTS lifecycle. It's had 24 months of real-world production hardening. For teams deploying to production servers, that track record matters more than having the absolute newest packages.

If you're building AI agents, running local LLM inference, or deploying containerized microservices — Ubuntu 24.04 LTS is the floor, not the ceiling. Upgrade now, deal with the Netplan YAML, and move on to the work that actually matters.

Frequently Asked Questions

What is the default Python version in Ubuntu 24.04 LTS?

Ubuntu 24.04 LTS ships Python 3.12.3 as the default system Python. The python3 command points directly to 3.12.3. Note that PEP 668 is enforced, so you must use virtual environments or tools like uv for pip installs — running pip install globally will produce an error by design.

What kernel does Ubuntu 24.04 LTS use and why does EEVDF matter?

Ubuntu 24.04 LTS uses Linux kernel 6.8, which introduces the EEVDF (Earliest Eligible Virtual Deadline First) CPU scheduler. EEVDF replaces the CFS scheduler that Linux used for over a decade. It assigns virtual deadlines to tasks, improving responsiveness for latency-sensitive and interactive workloads without manual tuning.

Does Ubuntu 24.04 support Docker and cgroup v2 natively?

Yes. Ubuntu 24.04 defaults to cgroup v2 exclusively, and Docker Engine 20.10+ works out of the box. However, the older Python-based Docker Compose v1 is not compatible — you need Docker Compose v2 (the docker compose plugin). Rootless Docker also works reliably on 24.04 thanks to proper cgroup v2 resource delegation.

Should I upgrade to Ubuntu 26.04 or stay on 24.04 LTS?

For production servers in mid-2026, 24.04 is the safer choice. It has had two years of point releases and real-world hardening. Ubuntu 26.04 just launched and hasn't completed its first point-release cycle. Choose 26.04 only for greenfield infrastructure where you need its newer packages and can tolerate early-LTS rough edges.

What does "frame pointers enabled by default" mean for developers?

It means that performance profiling tools like perf produce complete, accurate stack traces without recompiling your software. On previous Ubuntu LTS releases, frame pointers were compiled out for a marginal ~1-2% performance gain, which made flame graphs incomplete and unreliable. Ubuntu 24.04 reverses this tradeoff, prioritizing debuggability over micro-optimization.

Does Ubuntu 24.04 support Rust out of the box?

Yes. Ubuntu 24.04 ships Rust 1.75 in the repositories, which includes stabilized async traits and improved compile times. For most projects this is sufficient without installing rustup, though developers who need the absolute latest Rust version can still use rustup alongside the system package.

Photo by Gabriel Heinzer on Unsplash.