DevOps & SysAdmin Guides
Automate deployments, monitor systems, and manage servers like a pro.
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Automated Backups for Linux Servers: Scheduling, Verification, and Restore Drills
Automated backups for Linux servers (2026): schedule reliable backups with systemd timers, protect databases and application data, use encrypted off-host repositories, apply retention policies…
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Centralized Logging for a Small Stack: What to Collect and How to Keep It Useful
Centralized logging for a small stack (2026): collect structured application, container, system, proxy, job, and security-relevant logs with Grafana Alloy, store them in Loki, search them in Grafana…
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CI/CD Pipeline Explained (2025): Stages, Secrets, Environments, Rollouts & Metrics
CI/CD pipeline explained for 2025: CI vs continuous delivery vs continuous deployment, pipeline stages (build, tests, scans, deploy), artifact promotion (build once / deploy many), environments…
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DevOps Basics for Developers (2025): CI/CD, DORA, IaC, Observability & DevSecOps
DevOps basics for developers (2025): what DevOps really is, why it matters, CALMS + DORA metrics, CI/CD pipelines, deployment strategies (blue-green/canary), IaC, observability (SLIs/SLOs)…
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How to Write a Production-Ready Dockerfile for Small Web Apps
Production-ready Dockerfiles for small web apps (2026): use multi-stage builds, small trusted base images, deterministic dependency installs, .dockerignore, cache-efficient layers, non-root users…
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Kubernetes for Small Projects: When It Helps, When It Adds Risk
Kubernetes for small projects (2026): learn when Kubernetes helps with replicas, rolling deployments, service discovery, autoscaling, workload isolation, and standardized operations, and when cluster…
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Linux Server Administration Basics (2025): SSH, systemd, Firewalls, Backups & Monitoring
Linux server administration basics for 2025: essential commands, users & permissions, SSH hardening, package updates, systemd services, logs (journalctl + logrotate), networking, firewalls, storage…
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Linux Troubleshooting Playbook: Disk, CPU, Memory, and Network Checks
Linux troubleshooting playbook (2026): diagnose disk space, inode exhaustion, CPU load, I/O wait, memory pressure, swap, OOM kills, network connectivity, DNS, listening sockets, services, and logs…
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Minimal Monitoring Stack for Small Teams: Metrics, Alerts, and On-Call Basics
Minimal monitoring stack for small teams (2026): collect application and host metrics with Prometheus, build useful Grafana dashboards, a:contentReference[oaicite:0]{index=0}oute notifications with…
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Secrets Management Basics: Environment Variables, Vaults, and Rotation Strategy
Secrets management basics for small teams (2026): understand when environment variables are enough, when to use a vault or managed secret store, how to prevent secrets from entering source control…
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SRE for Beginners: Defining SLIs, SLOs, and Error Budgets in Practice
SRE for beginners (2026): learn how to define practical SLIs, SLOs, and error budgets, measure availability and latency from the user perspective, calculate good and bad events, understand burn rate…
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Zero-Downtime Deployments for Small Teams: Blue-Green vs Rolling
Zero-downtime deployments for small teams (2026): compare blue-green and rolling deployments, readiness checks, traffic draining, rollback, database migrations, mixed-version compatibility…