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Linux tutorials
Build a custom Linux kernel module for hardware device monitoring
Learn how to write, build and load a custom Linux kernel module that exposes hardware metrics through a character device, proc and sysfs interfaces, then sign it for Secure Boot and package it with DKMS for distribution across kernel updates.
Build a highly available Linux cluster with Pacemaker and Corosync
Build a two-node active-passive cluster with Pacemaker, Corosync and pcs, including STONITH fencing, resource constraints and automatic failover of a floating virtual IP.
Fix apt update E: Repository no longer has a Release file
Resolve apt update errors when repositories lose Release files due to expired GPG keys, discontinued repos, or corrupted package manager state. Includes diagnostics, recovery methods, and prevention strategies.
Configure Linux transparent huge pages and memory optimization for database workloads
Learn to configure transparent huge pages (THP) and optimize Linux memory management for database workloads. Covers THP disable/enable strategies, performance monitoring, and automation with systemd.
Configure Linux container memory limits and monitoring with systemd and cgroups v2
Set up memory limits and monitoring for containers using systemd services and cgroups v2 to prevent OOM kills and track resource usage.
Configure Linux memory cgroups v2 with systemd for advanced process isolation and resource control
Set up cgroups v2 unified hierarchy with systemd to implement memory limits, isolation policies, and automated pressure responses for container workloads and system processes.