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.
10 min read
Topic
Server
7 articles
Linux server services, deployment concerns, and production behavior.
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.
9 min read
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.
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.
16 min read
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
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