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
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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.
14 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
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