Technical Posts

A collection of technical guides, tutorials, and reference materials focused on Linux system administration, infrastructure management, and DevOps practices. Topics include ZFS storage management, SSH security and automation, Gentoo Linux configuration, container orchestration with Incus, network administration, and shell scripting techniques.

Browse by topic using the tags below each post, or explore the complete archive chronologically.

Bash Parameter Expansion Tricks

September 27, 2026

scripts system-administration

Master bash parameter expansion for default values, string manipulation, search and replace, and filename handling without external commands

Here Documents and Here Strings in Bash

September 24, 2026

scripts system-administration

Use here documents and here strings to embed multi-line text, generate config files, and feed input to commands without temporary files

Writing Robust Bash Scripts

September 21, 2026

scripts system-administration

Make your bash scripts safer and more reliable with set -euo pipefail, error traps, cleanup handlers, and defensive coding patterns

Bash Arrays and Associative Arrays

September 18, 2026

scripts system-administration

Learn how to use indexed arrays and associative arrays in bash for managing lists, lookups, and structured data in your scripts

Bootstrapping a Gentoo Server from Zero

September 15, 2026

gentoo system-administration

Complete walkthrough for building a production Gentoo server from initial setup through service deployment using the guides in this series

Self-Hosting Services Behind a Reverse Proxy

September 12, 2026

system-administration nginx tls

Architecture guide for running multiple self-hosted services behind an nginx reverse proxy with wildcard TLS certificates

Building a Complete Mail Server from Scratch

September 9, 2026

system-administration email

End-to-end guide for building a self-hosted mail server with Postfix, Dovecot, Rspamd, ClamAV, PostfixAdmin, and Roundcube

Testing and Verifying a Mail Server

September 6, 2026

system-administration email tls

Comprehensive testing checklist for verifying a complete mail server stack including SMTP, IMAP, TLS, authentication, spam filtering, and webmail

Installing Roundcube Webmail

September 3, 2026

gentoo system-administration email php

Install Roundcube on Gentoo with Apache and MySQL for browser-based email access with ManageSieve integration and PGP support

Managing Mail Domains with PostfixAdmin

August 31, 2026

gentoo system-administration email php

Install PostfixAdmin on Gentoo for web-based management of virtual mail domains, mailboxes, aliases, and quotas