#devops.
DevOps tutorials covering culture, practices, and tools for building, testing, and deploying software efficiently.
How to Fix apt & dpkg 'Could Not Get Lock' Errors on Ubuntu & Debian
Safely fix Debian/Ubuntu apt and dpkg lock errors by checking running processes, stopping update services, removing stale locks, and repairing dpkg.
How to Fix Debian/Ubuntu Initramfs Boot: fsck & Rescue Steps
Stuck at an initramfs prompt or black screen? Follow safe, step-by-step fsck and rescue steps to fix Debian/Ubuntu boot failures.
Best VPS for Self-Hosting in 2026: Hostinger vs DigitalOcean vs Vultr
A detailed, fact-checked comparison of the top VPS providers for self-hosting in 2026: real pricing, specs, and setup guidance for Hostinger, DigitalOcean, and Vultr.
How to Clean Journal Logs on Ubuntu and Debian Safely
Check, rotate, and vacuum systemd-journald logs on Linux. Set permanent disk limits to prevent future log growth.
Advanced Terraform Cloud-Scale State Cheatsheet
Manage infrastructure at scale: Terraform workspaces, backend state locks, refactoring resources, dynamic blocks, and import workflows.
GitHub Actions Advanced YAML Pipelines Cheatsheet
Optimize CI/CD pipelines: GitHub Actions environments, concurrency controls, custom reusable workflows, matrices, and cache optimizations.
PromQL Alerting Cheatsheet: Prometheus & Grafana
Write high-performance Prometheus monitoring rules: PromQL selectors, vector matching, rates, offsets, and alert configurations.
PostgreSQL Performance Tuning: Indexing, Queries, and Configuration
Practical PostgreSQL performance guide for developers. Indexing strategies, query optimization with EXPLAIN ANALYZE, memory tuning, and connection pooling. PostgreSQL 18 benchmarks included.
AWS IAM Policies & Boundaries Cheatsheet: The Complete Reference
Master advanced AWS security: IAM policy structure, Permissions Boundaries, Attribute-Based Access Control (ABAC), and Service Control Policies (SCPs).
AWS EKS Production Tuning Cheatsheet: The Complete Reference
Scale Kubernetes on AWS: EKS compute nodes (Karpenter), networking (VPC CNI), IAM Roles for Service Accounts (IRSA/EKS Pod Identities), and cost optimization.
DevOps Pipeline with Free Tools: Complete CI/CD Setup Guide 2026
Build a production-grade DevOps pipeline using free tools: GitHub Actions, Docker, CodeRabbit, SonarCloud, and Render. Step-by-step CI/CD setup with zero monthly cost.
Best AI Code Review Tools in 2026: Comparison & Guide
Compare CodeRabbit, GitHub Copilot Code Review, Amazon CodeGuru, Qodo, and GitLab Duo. Pricing, accuracy benchmarks, integration depth, and which to use for your team.
wget vs curl: When to Use Each (Complete Guide)
Learn the real differences between wget and curl. When to use wget for downloads and site mirroring, and when to reach for curl for APIs and HTTP debugging.
Related Topics
Discover more topics that complement what you've been reading about.