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DevOpsOctober 202610 min read

How to Fix Docker No Space Left on Device (7 Steps)

How to fix Docker no space left on device, step by step: read docker system df, prune safely, keep the newest images, cap logs and the journal.

DevOpsOctober 202611 min read

How to Store Docker Secrets and Environment Variables Safely

How to store secrets and environment variables in Docker safely: why ENV and ARG leak, then env_file, secret mounts, GitHub Actions and key rotation.

DevOpsOctober 202610 min read

Learn Docker from Scratch: First Container in 6 Steps

Learn Docker from scratch hands-on: build your first image, run a container, publish a port, read logs and keep data with a volume without guessing at errors.

DevOpsOctober 202611 min read

How to Deploy Next.js to a VPS with Docker and GitHub Actions

How to deploy Next.js to a VPS: a standalone Docker image, GHCR and GitHub Actions over SSH, with copy-paste commands and a table of common errors.

DevOpsOctober 202610 min read

How to Log In to a VPS Over SSH and Secure It (Beginner Guide)

How to log in to a VPS over SSH as a beginner: first login, a sudo user, an SSH key, password and root login off, a ufw firewall, and avoiding a lockout.

DevOpsOctober 202610 min read

How to Set Up Nginx Reverse Proxy for Docker and Cloudflare

Beginner guide to nginx reverse proxy setup for a Docker app behind Cloudflare: proxy_pass, headers, SSL mode, real IP, and a table of 502 and 504 fixes.

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