Ubuntu 26.04 System Internals
Kernel, init, cgroups, Rust coreutils, packaging, and unique Ubuntu 26.04 behaviour.
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Part 1 of 6
Use Rust Coreutils on Ubuntu 26.04: uutils vs GNU + Benchmarks
Ubuntu 26.04 LTS ships with uutils coreutils 0.8.0 as its default userland. Every time you run ls, cat, tr, sort, wc, head, or roughly 80 other…
17 min read·Apr 2026
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Part 2 of 6
Snap vs Flatpak vs APT on Ubuntu 26.04 LTS: Which to Use
Three package formats ship on every Ubuntu 26.04 LTS desktop, and Canonical’s defaults push you into all of them before you’ve opened a terminal. Firefox is…
25 min read·Apr 2026
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Part 3 of 6
Tune Ubuntu 26.04 Server Performance: BBR, sysctl, USE Method
Tune Ubuntu 26.04 LTS server with measured before/after benchmarks: USE method triage, BBR, BDP-sized TCP buffers, NIC rings, dirty ratios, and workload-specific addenda for Postgres, Redis,…
16 min read·May 2026
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Part 4 of 6
Configure Dracut on Ubuntu 26.04 LTS Server
Configure dracut on Ubuntu 26.04 LTS server: regenerate the initramfs, set hostonly mode, manage modules, and migrate cleanly from initramfs-tools.
10 min read·May 2026
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Part 5 of 6
Ubuntu 26.04 cgroup v2 Migration: What Breaks and How to Fix It
Migrate to Ubuntu 26.04 cgroup v2 after systemd 259 drops v1. Fix Docker, Kubernetes, and resource limits with tested commands on kernel 7.0.
15 min read·Apr 2026
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Part 6 of 6
Install KVM/QEMU on Ubuntu 26.04 LTS Server
Install KVM, QEMU, and libvirt on Ubuntu 26.04 LTS server. Configure libvirtd, create a NAT and bridged network, and boot guests with virt-install.
9 min read·May 2026