DNS Changes Not Working: Check the Record, Resolver and Cache
A step-by-step troubleshooting guide to identify why DNS changes are not resolving, covering authoritative records, TTL, local caches, and origin connectivity.
AIOOS FIELD GUIDE LIBRARY
Practical guides for websites, servers and deployment.
Search tested steps, decision guides and troubleshooting notes without wading through an unrelated tool directory.
- Decisions before commands
- Checks after every critical step
- Limitations and update dates kept visible
15 guides
Plan Your Website Content Before Choosing a Design
Map your audience, their main tasks, and the pages they need before choosing a template. The result is a practical outline for navigation and future content.
Static Site, WordPress, or Next.js? Choose by Maintenance Cost
Compare static sites, WordPress, and Next.js by editing workflow, update frequency, hosting, plugins, security, and migration effort—not popularity.
Design Website Navigation, Categories, URLs, and Breadcrumbs
Turn a content plan into a site structure visitors can understand. Work through main navigation, categories, descriptive URLs, breadcrumbs, and redirects for old pages.
Design a Homepage That Helps First-Time Visitors
Make the first screen explain who the site serves, what visitors can accomplish, and where to begin. Add proof and useful routes without relying on slogans or carousels.
Build a Readable Template for Long-Form Tutorials
Create a consistent article layout with a useful summary, clear headings, a table of contents, steps, code blocks, warnings, sources, and a next action.
Design a Single-Server Setup: Reverse Proxy, App, and Database
Draw the boundaries between the public entry point, reverse proxy, application, database, files, and backups so fewer ports are exposed and incidents are easier to diagnose.
Host Multiple Websites on One Server with Caddy
Route each domain to its own local service with Caddy. Check DNS, upstream addresses, HTTPS, configuration validation, safe reloads, and every affected site.
Manage Production Secrets and Environment Files Safely
Separate ordinary configuration from secrets. Choose where to store .env files and service credentials, restrict access, avoid logging secrets, and plan rotation and incident response.
What to Monitor on a Small Website Server
Start with user-visible availability, then watch application health, CPU, memory, disk, backup age, and logs. Set alerts that reflect sustained problems rather than brief spikes.
Troubleshoot 502, 504, and HTTPS Errors Layer by Layer
Trace faults through DNS, network access, TLS, Caddy, the local upstream, application, and database using evidence at each layer instead of blindly restarting the server.
Keep a Website Server Running with a Maintenance Checklist
Organize daily, weekly, monthly, and quarterly checks for availability, patches, capacity, backups, accounts, certificates, dependencies, and recovery drills.
Deploy Your First Static Website to a Linux Server with Caddy
Upload a local HTML and CSS site to a safe web directory, install Caddy, configure the domain, validate the configuration and publish without exposing a development server.
First Hour on a New Ubuntu or Debian Server
Turn a blank Ubuntu or Debian instance into a predictable host by checking resources, updating packages, setting time, creating an administrator and documenting the result.
How to Choose Your First Cloud Server
Choose a sensible first server for a small website by checking your workload, location, operating system, memory, storage, renewal cost, and what to verify after purchase.