linux Archives - Page 4 of 31

Networking tutorial - IT technology blog

Configuring GRE over IPsec on Linux for Secure OSPF Dynamic Routing

October 4, 2026

Pure IPsec tunnels drop the multicast packets that dynamic routing protocols like OSPF require. This operational guide shows you how to wrap GRE in IPsec transport mode on Linux, securing branch-to-branch links while maintaining dynamic route adjacencies.

Linux

Configure Linux Network Bonding and LACP with NetworkManager and Netplan

October 4, 2026

Learn how to configure Linux network bonding and 802.3ad LACP using Netplan and NetworkManager. This guide covers mode comparisons, configuration steps, and real-time failover verification.

Linux

Managing Resource Limits with Cgroups v2 and Systemd Slices on Linux

October 3, 2026

Learn how to partition and protect Linux server resources using modern Cgroups v2 and systemd slices. Control CPU bandwidth, memory ceilings, and disk I/O per service to eliminate noisy neighbors.

Linux

Mastering Linux Security Auditing with Auditd: Rules, File Monitoring, and Log Analysis

October 3, 2026

Secure your Linux infrastructure using Auditd. This step-by-step guide explains writing persistent kernel rules, tracking file tampering, and analyzing logs with ausearch and aureport.

Security

Deploy HashiCorp Vault on Linux: Centralized Secrets and Automated Credential Rotation

October 3, 2026

Deploy HashiCorp Vault on Linux to eliminate secret sprawl. Learn how to install Vault, store encrypted secrets, and automate dynamic database credential rotation with short-lived leases.

HomeLab

Securing Your HomeLab with CrowdSec on Docker: Collaborative Intrusion Prevention

October 2, 2026

Secure your self-hosted services by running CrowdSec in Docker. This step-by-step guide shows how to parse proxy logs, connect community threat feeds, and block attackers at the host firewall level.

Networking

Detect and Prevent ARP Spoofing with Arpwatch and Dynamic ARP Inspection

October 2, 2026

Secure your internal Layer 2 network against ARP poisoning attacks. This tutorial covers passive monitoring with Arpwatch on Linux and active mitigation using Dynamic ARP Inspection and DHCP Snooping on managed switches.

Linux

Securing Linux Servers with AppArmor: Custom Profiles and Sandboxing Guide

October 2, 2026

A practical field guide to sandboxing production Linux services with AppArmor. Compare MAC architectures, build custom profiles with aa-genprof, and stop privilege escalation attacks cold.

Linux

Production ZFS on Linux: Build Resilient Pools, Tune Datasets, and Automate Snapshots and Scrubs

October 1, 2026

Learn how to deploy OpenZFS on Linux to eliminate silent bit rot. This practical guide covers creating 4K-aligned mirror pools, tuning dataset record sizes for MySQL and PostgreSQL, managing instant snapshots, and automating scrubs.

HomeLab

Ditch Docker Compose: Managing HomeLab Containers with Podman Quadlets

September 23, 2026

Transition from Docker Compose to Podman Quadlets to manage your HomeLab containers as native Systemd units. Learn how to improve security with rootless containers and simplify service management.