Blog
KEYDAL blog: what we learn in the field on hosting, domains, servers, security, software and press law; step-by-step guides and current notes.
Domain Search Guide 2026: WHOIS, RDAP, DNS and Domain Discovery
A comprehensive 2026 guide to domain search, WHOIS lookup, RDAP, DNS and registration checks. Covers CLI tooling, web utilities, privacy.
DomainsDomain IP Lookup: Site IP Address Discovery, DNS, Reverse Lookup and WHOIS Guide
A comprehensive 2026 guide to finding a domain's IP address with DNS lookup (dig, nslookup, host), reverse lookup, WHOIS, RDAP.
HostingDedicated Server Hosting Guide 2026: Hardware, Network and Colocation
Comprehensive dedicated server hosting guide: CPU, RAM, NVMe, RAID, IPMI, port speed, SLA, Turkey data centers, price ranges.
EmailCorporate Email Address Guide 2026: Domain, MX, SPF, DKIM, DMARC and Provider Comparison
How to set up a corporate email address, configure info@ shared mailboxes, and pick the right provider.
HostingWhere Is .com Used? Complete Guide to .com and .net Extensions
Where .com is used, what .com means, .com vs .net differences, website extensions, registration process.
HostingCheapest Linux Hosting 2026: Prices, Specs, and a No-Nonsense Buying Guide
A vendor-neutral 2026 buying guide for the cheapest Linux web hosting: real price ranges, NVMe SSD, LiteSpeed/Nginx, cPanel and renewal traps.
DomainsHow to Buy a Domain Name from Google in 2026: Squarespace Migration, Cloud Domains and Google Registry
After Google Domains shut down, how do you buy a domain from Google or within Google's ecosystem?
SecurityBTK Lookup Guide: Website Access Blocks, Line and Operator Queries in Turkey
How to perform BTK lookups in Turkey: website access block status, banned site checks, line and operator queries, the 5651 law.
SecurityBanned Websites in Turkey: Complete Blocked Sites List and Legal Guide 2026
Which websites are banned in Turkey? Law No. 5651, BTK and USOM decisions, how to query blocked sites, legal consequences of accessing them.
HostingWeb Hosting Guide 2026: Plans, Prices, the Truth About Unlimited Hosting and Selection Criteria
Comprehensive 2026 guide on web hosting plans, pricing tiers, the CPU/inode/I/O reality behind unlimited hosting, NVMe vs SSD.
HostingSpeeding Up a Web Server with Gzip and Brotli Compression
What are Gzip and Brotli compression and how do they speed up a website? Enabling compression on Nginx and Apache.
DomainsDomain Search, Name Selection and Buying: The Complete Pillar Guide
End-to-end pillar guide covering domain lookup, WHOIS/RDAP, TLD types, .tr rules, transfers, pricing tiers and choosing the right registrar before you
HostingMultiple Sites on One Server: Virtual Host Configuration
What is a virtual host and how do you host multiple sites on one server? Nginx server block and Apache virtual host configuration.
Hostingtmux and screen: A Guide to Persistent Terminal Sessions
What are tmux and screen, and why use them? A guide to creating persistent terminal sessions so processes keep running when your SSH connection drops.
HostingServer Timezone, Hostname and Locale Configuration
How to set timezone, hostname and locale on a Linux server? timedatectl, hostnamectl, NTP time synchronization and why these settings matter.
HostingSwap Space on a Server: What It Does and How to Configure It
What is swap space and what does it do? Creating a swap file on a Linux server, the swappiness setting, how much swap you need and its performance eff
HostingLinux Package Management: Installing Software with apt and dnf
What is a package manager on Linux and how do you use apt and dnf? Installing, updating and removing software.
HostingCron Jobs on Linux: A Guide to Creating Scheduled Tasks
What is a cron job and how do you create a scheduled task on Linux? crontab syntax, scheduling examples, backup automation and cron job troubleshootin
SoftwareWhat is Redis? Installation, Commands and Real-World Usage Patterns
What Redis is, how to install it, the data types — cache, session, rate limiting, pub/sub, streams and cluster with Node.js, Python and Docker example
Hostingsystemd Service Management: Creating, Starting and Monitoring Services
What is systemd and how do you manage services with systemctl? Starting and stopping services, enabling auto-start.
HostingLSCache (LiteSpeed Cache) Guide: Server-Level Caching for WordPress
What is LiteSpeed Cache (LSCache) and how to configure it? LiteSpeed Cache for WordPress plugin, QUIC.cloud CDN, ESI block caching.
SEOHow to Optimize a Website: Frontend, Backend, Database and CDN End-to-End
A complete guide to website optimization: image and font optimization, Nginx/Apache tuning, PHP opcache, database indexing, CDN selection, caching lay
SecurityHow to Get an SSL Certificate: Free vs Paid Options Explained
How and where to get an SSL/TLS certificate. Let's Encrypt, ZeroSSL, Sectigo and DigiCert compared. Installation with Certbot, acme.sh, cPanel and Ple
HostingDomain Lookup Tools: WHOIS, RDAP and DNS Guide
Every way to query a domain with dig, whois, nslookup and RDAP. Reading DNS records, interpreting WHOIS.
SEOBest WordPress SEO Plugins: Yoast vs Rank Math vs AIOSEO vs SEOPress Compared
A detailed comparison of the top WordPress SEO plugins. Yoast SEO, Rank Math, AIOSEO, SEOPress, The SEO Framework — which plugin when?
HostingLinux User and Group Management: useradd, sudo and Authorization
How to create and manage users and groups on Linux: useradd, usermod, sudo authorization and the principle of least privilege for server security.
HostingLinux File Permissions: chmod, chown and Privilege Management
How do Linux file permissions work? The rwx permissions, granting access numerically and symbolically with chmod, changing ownership with chown.
SecurityXSS Attacks and Defending with Content Security Policy (CSP)
Reflected, stored and DOM-based XSS explained, plus sanitization, output encoding and layered protection with Content Security Policy.
HostingWhat Is Web Hosting? Types, Pricing, and How to Choose in 2026
What web hosting is, the main types (shared, VPS, dedicated, cloud), how pricing works, and how to choose the right provider. A complete 2026 guide.
HostingWhat Is DNS? DNS Settings, How to Change Them, and the Best DNS Servers
What is DNS, how does it work, where do you change DNS settings, and which resolvers (Cloudflare, Google, Quad9) are best? A step-by-step technical gu
SoftwareWebSocket vs Server-Sent Events: Making the Right Real-time Choice
Compare WebSocket and Server-Sent Events — full-duplex vs one-way, use cases, Socket.io, reconnection and proxy compatibility.
SoftwareVue 3 Composition API: Reactivity, Refs and Composables
Vue 3 Composition API — ref, reactive, computed, watch, composables, lifecycle hooks and comparison to the Options API.
HostingWhat Is a VPS? VPS vs VDS and a Complete VPS Hosting Guide
What a VPS is, how it compares to a VDS, and what to look for when buying one. KVM, OpenVZ, NVMe SSD, and DDoS protection explained for scalable serve
HostingTerraform Infrastructure as Code: AWS, Azure and Hetzner Examples
Manage infrastructure as code with Terraform — HCL syntax, providers, modules, state, workspaces and practical AWS and Hetzner examples.
SoftwareTailwind CSS v4: Oxide Engine, CSS-First Config and Migration Guide
What is new in Tailwind CSS v4 — Oxide engine speedups, @theme directive, container queries, CSS-first config and migrating from v3.
SoftwareTailwind CSS from Scratch: Build Modern UIs with Utility-First
Install Tailwind, learn the utility-first mindset, responsive design, dark mode, custom themes and component extraction — a complete starter guide.
SoftwareSQL Query Optimization: JOIN Strategies, Subqueries and Index Usage
Speed up slow SQL queries — read EXPLAIN output, understand JOIN types, apply index strategies, compare subqueries and CTEs with examples.
SecuritySQL Injection: How It Works and How Parameterized Queries Stop It
The mechanics of classic, blind, time-based and union-based SQL injection, plus how prepared statements and ORMs shut them down for good.
SoftwareWhat Is Software Development? Processes, Methodologies, and Tools
What software development is, which methodologies (Agile, Scrum, Waterfall) fit, and which languages and tools you need. A beginner-friendly guide.
APIREST API Security Guide: Authentication, Rate Limiting, and Best Practices
API security with JWT, OAuth2, rate limiting, input validation, CORS, and HTTPS. A practical walkthrough of the OWASP API Security Top 10.
SoftwareRedis Fundamentals: Cache, Pub/Sub, Session Store and Persistence
Redis use cases in production — cache, session store, rate limit, queue, pub/sub, persistence (RDB/AOF) and cluster architecture.
HostingPrometheus and Grafana Server Monitoring: Metric Collection Guide
Set up production-grade monitoring with Prometheus metrics, Grafana dashboards, node_exporter, Alertmanager and PromQL queries.
SoftwarePostgreSQL Performance Optimization: Indexes, EXPLAIN, and Tuning Guide
PostgreSQL query optimization with EXPLAIN ANALYZE, indexing strategies, connection pooling, and vacuum/autovacuum tuning for production workloads.
HostingPlesk Panel Management: Domains, Databases, Email and SSL
Complete Plesk guide — add domains, create databases, set up mailboxes, install Let's Encrypt SSL and harden security from A to Z.
SoftwarePlaywright End-to-End Testing: Modern Browser Automation
End-to-end testing with Playwright — selector strategies, fixtures, trace viewer, parallel testing, CI integration and a Cypress comparison.
SecurityPassword Hashing: bcrypt, argon2id and scrypt Compared
Modern password hashing — bcrypt, argon2id and scrypt compared, salt, pepper, work factor tuning and Node.js / Python implementations.
SecurityOWASP Top 10 2026: Web Application Risks and How to Prevent Them
A walkthrough of the OWASP Top 10 2026 — Broken Access Control, Injection, Cryptographic Failures, SSRF and more, with practical mitigations.
SoftwareOpenTelemetry Distributed Tracing: Microservice Observability
Distributed tracing with OpenTelemetry — spans, trace context, auto-instrumentation, Jaeger and OTLP export setup guide.
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