Container fails with cgroup error
June 11, 2026
Fix cgroup mount errors when running a systemd container on an OpenRC host
System Administration
Linux system administration guides covering server configuration, user management, security hardening, performance tuning, and infrastructure maintenance. Essential knowledge for managing Linux servers and workstations.
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
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
Gentoo Custom Patches
May 12, 2026
Create custom patches for Gentoo packages using git diff and Portage's user patch system
ZFS Autosnapshot
May 9, 2026
Configure automatic ZFS snapshots with zfs-auto-snapshot and custom patch for improved date formatting
Command Line Git Client
May 6, 2026
Install git on Gentoo and configure it for GitHub access using SSH keys
Improving ZFS Efficiency
May 3, 2026
Improve ZFS efficiency and management by creating separate datasets for tmp and var directories
Installing and Configuring Cron
April 30, 2026
Set up cronie on Gentoo for automated task scheduling with crontab configuration
Setting Up a New Hetzner Server
April 27, 2026
Comprehensive guide to setting up a Gentoo server on Hetzner dedicated hardware with RAID1, LUKS encryption, and ZFS storage
Find the Process ID (PID) of a Process
April 24, 2026
Quick method to find the process ID (PID) of a running process using ps and grep commands
Nmap Cheatsheet
April 21, 2026
Essential nmap commands for host discovery, MAC address enumeration, and vulnerability scanning
Find Gentoo Packages with Eix
April 18, 2026
Install and use eix for faster, more efficient Gentoo package searching compared to emerge -s
Add System-Specific CPU Flags
April 15, 2026
Configure CPU-specific flags in Gentoo's make.conf for optimized compilation using cpuid2cpuflags
Gentoo Install File Clean Up
April 12, 2026
Clean up stage3 tarball file after Gentoo installation is complete and system is stable
Directories Hard to Read (aka DIRCOLORS)
April 9, 2026
Fix hard-to-read dark blue directories by customizing dir_colors configuration for improved terminal visibility
Custom Script Directories Included in $PATH
April 6, 2026
Automatically include custom script directories in PATH with support for local and shared scripts across your network
Set Up Common Aliases
April 3, 2026
Configure system-level bash aliases available to all users with centralized management
Setting Up SSH Keychain
March 31, 2026
Configure keychain to manage SSH keys seamlessly in interactive shells and scripts
Configuring Bashrc for SSH Keychain
March 28, 2026
Configure the default bashrc template with SSH keychain integration for seamless key management across users
Create an SSH Keypair
March 25, 2026
Guide to creating SSH keypairs with RSA and modern algorithms, including key type comparison and OpenSSH version support
ZFS Cheatsheet - Essential Commands and Operations
March 22, 2026
Quick reference for ZFS snapshot management, pool creation, and essential commands
Incus Cheatsheet - Essential Commands and Configuration
March 19, 2026
Quick reference guide for Incus container commands, mounting directories, and running nested Incus instances
Live Expanding Disk Space On Windows Guest With ZFS
March 16, 2026
Step-by-step guide to expanding a Windows guest VM disk using ZFS and virsh, including recovery partition management
Snapshot Cannot Be Restored Due to Subsequent Snapshots
March 13, 2026
Fix "cannot be restored due to subsequent snapshot" errors when rolling back Incus container snapshots by configuring zfs.remove_snapshots
Reduce TTYs
March 10, 2026
Minimize resource usage on headless servers by reducing the number of active TTYs to one
Cleaning Gentoo Kernels
March 7, 2026
Automatically clean up old Gentoo kernel files to free boot partition space using eclean-kernel
Dedicated Server, Public Subnet, and Vswitch on Hetzner
March 4, 2026
Configure Hetzner vswitch with public subnet routing for virtual machines using layer 3 networking instead of layer 2
Hetzner Vswitch/VLAN Configuration
March 1, 2026
Set up Hetzner vswitch with VLAN tagging for static IP management across virtual machines on Gentoo
Get serial numbers for NVMe drives
February 20, 2026
Query NVMe drive serial numbers and test disk performance with hdparm
Clearing Disks in Rescue Environment
February 17, 2026
Clean up RAID arrays and wipe disks when starting fresh in a rescue environment
List kernel drivers in use
February 14, 2026
Find all kernel drivers currently in use by your hardware with lspci
ZFS on Hetzner Rescue
February 11, 2026
Install and use ZFS in Hetzner's rescue environment to access your ZFS pools
Getting System Information
February 8, 2026
Quick commands to get CPU count, memory size, and disk information on a Linux server
Using Hetzner Rescue
February 5, 2026
Quick reference for Hetzner's rescue system with common installimage commands and useful utilities
Prevent host from being added to knownhosts
February 2, 2026
bash alias to bypass knownhosts
Save time with tab
January 26, 2026
Leverage tab and bash completion to be more effective on the Linux command line
Open ssh connection when available
January 19, 2026
bash script to open connection when server is available
Be more efficient with screen
January 12, 2026
Leverage screen to be more effective on the Linux command line
Estimate How Long to Compile Gentoo Package
January 5, 2026
Track Gentoo package compilation progress and estimate time remaining with the genlop utility