Container fails with cgroup error
June 11, 2026
Fix cgroup mount errors when running a systemd container on an OpenRC host
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.
IRedMail Installation
June 8, 2026
Step-by-step guide to installing iRedMail with proper DNS configuration for email deliverability
Setting up fail2ban
June 5, 2026
Protect your server from brute force attacks by installing and monitoring fail2ban
Reserved Network Ranges Beyond 192.168.x.x
June 2, 2026
Complete guide to private IP ranges (10.x, 172.16-31.x, 192.168.x) and documentation addresses (203.0.113.x), including VPN collision avoidance and vendor defaults
Getting and Setting Incus Mac Addresses
May 30, 2026
View and configure MAC addresses for Incus containers, including a script to generate random virtual MAC addresses
Cat the Source of Program in Path
May 27, 2026
Use which and cat together to quickly read shell script source code from anywhere in your PATH
Ansible Accept Host Keys the First Time
May 24, 2026
Set up Ansible to accept SSH host keys on first connection while maintaining security for subsequent connections
Remote Unlock with Genkernel
May 21, 2026
Configure genkernel to build an initramfs with SSH and LUKS support for remote system unlocking on Gentoo
Eth0 to Predictable Network Names
May 18, 2026
Migrate from eth0 to predictable network interface names on Gentoo using udevadm and OpenRC
Gentoo Logging
May 15, 2026
Set up syslog-ng and logrotate for system logging on Gentoo with hardened configuration