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Dargslan

Dargslan

Linux Firewall Configuration with UFW and iptables

Master Linux firewall configuration with UFW and iptables. Learn safety practices, default policies, SSH hardening, rate limiting, NAT setup, and troubleshooting. Complete guide for sysadmins covering basic UFW commands to advanced iptables rules with examples.

Setting Up a Web Server on Linux (Apache, Nginx, or Lighttpd)

Complete guide for setting up Apache, Nginx, or Lighttpd web servers on Linux. Covers installation, virtual hosts, HTTPS with Let's Encrypt, firewall configuration, SELinux setup, performance tuning, and monitoring. Includes commands for Debian/Ubuntu and RHEL/CentOS systems.

Top 25 Linux Commands Every SysAdmin Must Know

A comprehensive guide to 25 essential Linux commands every system administrator must master. Covers file management, process control, system monitoring, networking, and security tools like ls, grep, systemctl, ssh, and rsync with practical examples and safety tips.

Disk Management in Linux: fdisk, LVM, and Mount Points Explained

Linux disk management guide covering fdisk partitioning, LVM setup with physical volumes, volume groups and logical volumes, plus mount points and filesystem creation. Includes step-by-step commands for safe disk operations, resizing, and persistent mounts via fstab.

Mastering Cron Jobs and Task Scheduling in Linux

Master Linux cron jobs and task scheduling with this comprehensive guide covering crontab syntax, environment setup, security best practices, troubleshooting, and systemd timers. Learn to automate backups, maintenance tasks, and system operations reliably across Linux environments.

Systemd vs SysVinit: Which Is Better for Modern Linux?

A comprehensive technical comparison of systemd and SysVinit for Linux administrators. Covers architecture differences, performance benchmarks, security considerations, and practical recommendations for servers, embedded systems, and containers.

Lessons from the AWS US-EAST-1 Outage: What Cloud Engineers and System Administrators Can Learn

The October 2025 AWS US-EAST-1 outage revealed how even the most advanced infrastructures can falter — and what every cloud engineer can learn from it.

How to Secure SSH Access on Linux Servers

Secure SSH access on Linux servers by using key-based authentication, disabling password login, restricting root access, hardening sshd config, implementing firewall rules, enabling fail2ban, monitoring logs, and using 2FA where possible.

Linux Networking Essentials Every Admin Should Know

Linux system administrators covering networking fundamentals, interface configuration, routing, VLANs, firewalls, VPNs, performance tuning and troubleshooting with hands-on examples for Ubuntu RHEL CentOS.

AWS US-EAST-1 Service Disruption Report - ECS, EC2, and Dependent Services – October 28, 2025

AWS experienced a significant outage in the US-EAST-1 Region on October 28, 2025, affecting ECS, EC2, and several dependent services such as Fargate, EMR Serverless, MWAA, and Glue. The incident lasted nearly 14 hours and was caused by control-plane contention within ECS’s internal infrastructure.