Linux 7.1.8 Is Stable While 7.2 Is Still a Release Candidate
Kernel.org now lists Linux 7.1.8 as stable and 7.2-rc7 as mainline; here is what those labels mean for upgrades and bug reports.
7 min read
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Ubuntu 26.04 LTS: Read the Upgrade Path, Not Just the Feature List
Ubuntu 26.04 LTS is out; its new release-note structure separates the two-year LTS jump from the smaller 25.10 upgrade.
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Fedora Linux 44 Is Here: Four Changes to Check Before Upgrading
Fedora 44 shipped on 28 April 2026; inspect DNF5 integration, installer networking, toolchain changes, and the supported upgrade path.
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Diagnose a Failed systemd Service Without Guessing
Use status, show, journalctl, unit dependencies, and a disposable user service to turn a failed unit into an exact exit reason.
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Create and Verify an SSH Key Before You Install It
Generate an Ed25519 key in a disposable directory, compare public-key fingerprints, and install only the public half on a server.
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Trace Linux Name Resolution from getent to the DNS Answer
Separate application lookup policy, the local resolver, and direct DNS queries with getent, resolvectl, and dig.
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ripgrep 15.2 vs GNU grep 3.12: A Search Behavior Baseline
A controlled 11 MB repository shows the tools agree when scope matches, while their recursive defaults intentionally select different files.
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curl 8.21 vs GNU Wget 1.25: Safer Defaults for Automation
A local HTTP fixture exposes decisive differences in 404 exit codes, redirect following, output, retry policy, and protocol scope.
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SIGTERM Before SIGKILL: How Linux Process Shutdown Actually Works
Signals request process actions; a safe lab shows SIGTERM running cleanup with exit 0 while SIGKILL bypasses handlers and yields status 137.
9 min read
Namespaces and cgroups: The Two Boundaries Behind Containers
Namespaces change what processes can see; cgroups account for and limit resources. Inspect both without pretending a container is a tiny VM.
10 min read
Linux Load Average Without Guesswork
Read Linux load average as a queue signal, separate runnable work from uninterruptible waits, and pair the three familiar numbers with CPU count and PSI.
12 min read
The Linux Sysadmin Command Map: 39 Safe Starting Points
A practical command map for inspecting Linux first, then changing files, processes, storage, networking, logs, users, and packages with portability boundaries visible.
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Debian 13.6 vs Alpine 3.24.1: A Server Baseline
A measured baseline for two current Linux server images, comparing size, libc, packages, service model, documentation, maintenance, and workload fit.
15 min read
What Happens When You Press Enter in a Linux Terminal?
Follow ls -la from a terminal keystroke through shell parsing, command lookup, process replacement, filesystem calls, and pixels on screen.
11 min read
Linux Permissions Explained: Files, Directories, and 755
Stop memorizing 755. Read owner, group, and other permissions as answers to concrete file and directory operations.
13 min read
How Linux Pipes Actually Work
Replace the punctuation model of `|` with connected processes, file descriptors, bounded kernel buffers, and backpressure.
12 min read
Why df and du Show Different Disk Usage
Reconcile filesystem allocation with files a directory walk can reach, then diagnose gaps without reaching for a cleanup command.
14 min read
Linux Memory Explained: Beyond Used and Free
Read RAM as anonymous memory, reclaimable cache, kernel state, swap, and pressure—then separate host capacity from cgroup limits.
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Read the systemd Journal Without Guessing
Build a reliable journalctl workflow by separating boot selection, unit filters, time windows, priority, and persistent storage.
13 min read
Shell Scripts That Survive Beyond Bash
Keep everyday automation portable by treating the shell as a language boundary, checking tools explicitly, and testing the unhappy path.
10 min read
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