Documentation & Blog

Field notes for Linux, Cloud & DevOps

In-depth, production-tested guides covering everything from Linux internals to cloud architecture, CI/CD pipelines, monitoring, and application security — written from real infrastructure work, not theory.

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Linux

Filesystem hierarchy, permissions, users & groups, systemd, journald, cron, networking, SSH hardening, disk management, LVM, and RHCSA exam tips.

Docker

Containers, images, volumes, networks, Dockerfiles, Compose stacks, private registries, and the troubleshooting playbook for production containers.

Git

Git internals, branching, merging, rebasing, cherry-picking, stashing, resetting, reverting, tagging, Git Flow, and resolving merge conflicts for real.

AWS

IAM, EC2, S3, Route53, CloudFront, ACM, RDS, CloudWatch, VPC, ALB, and Security Groups — with real deployment architectures and interview questions.

Jenkins

Installation, declarative pipelines, agents, credentials, GitHub/Bitbucket webhooks, deployment stages, and pipeline troubleshooting.

Ansible

Inventory files, playbooks, variables, roles, handlers, Ansible Vault, and real-world playbooks for hardening and deploying servers at scale.

Cloudflare

DNS management, SSL/TLS modes, caching rules, firewall, WAF, rate limiting, page rules, origin certificates, and Cloudflare Tunnel.

Bitbucket

Repository setup, Bitbucket Pipelines YAML, branching permissions, pull requests, and deployment stages to servers and cloud targets.

SonarQube

Installation, quality profiles, quality gates, scanner configuration for multiple languages, and wiring SonarQube into a CI/CD pipeline.

cPanel

Account management, email configuration, backups, SSL, DNS zones, PHP versions, and MySQL administration through cPanel/WHM.

Nagios

Nagios Core installation, NRPE agent setup, host and service checks, notification/escalation rules, and the commands you'll run daily.

OWASP

SQL injection, XSS, CSRF, RCE, and the rest of the OWASP Top 10 — with vulnerable/fixed code examples and the security headers that stop them.

Wazuh

Wazuh manager/indexer/dashboard architecture, agent deployment, custom detection rules, alert tuning, and the operational dashboard workflow.

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Latest Articles

Wazuh

Wazuh: SIEM Architecture, Agents & Detection Rules

Wazuh manager/indexer/dashboard architecture, agent deployment, custom detection rules, alert tuning, and the operational dashboard workflow.

8 min readAdvanced

OWASP

OWASP Top 10: Vulnerabilities, Exploits & Fixes

SQL injection, XSS, CSRF, RCE, and the rest of the OWASP Top 10 — with vulnerable/fixed code examples and the security headers that stop them.

9 min readAdvanced

Bitbucket

Bitbucket: Repositories, Pipelines & Deployments

Repository setup, Bitbucket Pipelines YAML, branching permissions, pull requests, and deployment stages to servers and cloud targets.

8 min readBeginner

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Editor's Picks

Linux

Linux Administration: The Complete Field Guide

Filesystem hierarchy, permissions, users & groups, systemd, journald, cron, networking, SSH hardening, disk management, LVM, and RHCSA exam tips.

5 min readIntermediate

Docker

Docker in Production: Images, Volumes, Networks & Compose

Containers, images, volumes, networks, Dockerfiles, Compose stacks, private registries, and the troubleshooting playbook for production containers.

8 min readIntermediate

Git

Git Mastery: Branching, Rebasing & GitHub Workflows

Git internals, branching, merging, rebasing, cherry-picking, stashing, resetting, reverting, tagging, Git Flow, and resolving merge conflicts for real.

10 min readBeginner

AWS

AWS for DevOps: IAM, EC2, VPC, S3 & Deployment Patterns

IAM, EC2, S3, Route53, CloudFront, ACM, RDS, CloudWatch, VPC, ALB, and Security Groups — with real deployment architectures and interview questions.

8 min readAdvanced

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