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
9 guides
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.
Back Up and Restore SQLite and PostgreSQL Databases
Choose a consistent backup method for SQLite or PostgreSQL, then document encryption, off-site storage, retention, verification, and a restore rehearsal in isolation.
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.
Help Baidu and Google Discover a New Website: A Practical SEO Checklist
Prepare useful pages, crawlable links, metadata, canonical URLs, robots and sitemap, then verify the site and submit it through Google Search Console and Baidu Search Resource Platform.
How Caddy Automatic HTTPS Works and How to Troubleshoot It
Understand Caddy automatic HTTPS, verify DNS and ports in order, inspect service logs and solve common certificate failures without destructive guesswork.
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.
DNS for Beginners: A, AAAA, CNAME and TTL Explained by Practice
Point a root domain and www host to a first server, understand A, AAAA, CNAME and TTL, verify public DNS and remove conflicting records.
Why I Use RainYun for an Early-stage Website
My first-hand notes on using RainYun for an early-stage content website: what feels stable in my workload, why the price is manageable and what I still check before recommending it.