Blog
Development, infrastructure, SEO, AI and IT for business — short and to the point.
1495 articles
- Databases & data4 min
PostgreSQL vs MySQL: Which Database to Choose
Both databases are reliable and fit most projects. PostgreSQL is the richer choice for complex logic, reporting, JSON and geodata; MySQL is the simple, widely available option for typical websites, CMSs like WordPress and workloads of simple queries.
Basics - Hosting & cloud4 min
Managed vs Unmanaged Hosting: Who Takes Care of the Server
With managed hosting the provider handles server updates, backups, security and monitoring; with unmanaged hosting you do it yourself, so the choice depends on whether someone on your team can and will administer the server.
Basics - IT careers4 min
Impostor Syndrome in IT: Why It Happens and How to Cope
Impostor syndrome is the feeling that you know less than people expect, even when the facts say otherwise; the sheer breadth of IT amplifies it, and a brag document, regular feedback, realistic comparison and talks with a mentor help you cope.
Basics - Tools & no-code4 min
How to Build an AI Agent Workflow in n8n
In n8n an agent is the AI Agent node with a model, memory and tools attached; give it a clear system prompt, structured output and limits, and keep actions with consequences in regular nodes.
Advanced - IT by industry4 min
What Is a Hotel Channel Manager and How It Prevents Overbooking
A channel manager pushes rates and free room counts to every booking site and deducts inventory after each booking, so the same room cannot be sold twice through different channels.
Basics - Networks & office IT4 min
Router vs Switch vs Access Point: What Each Device Does
A router connects your office to the internet and to other networks, a switch connects wired devices inside the office, and an access point adds Wi-Fi to that wired network; home-style combo boxes do all three, while growing offices usually split them.
Basics - IT for business3 min
Intellectual Property Clauses in Software Development Contracts
The contract must state which rights in the created code pass to the client and when, what the contractor keeps as pre-existing code, how open-source components are handled and which law governs disputes.
Advanced - Web development4 min
How to Use the Fetch API: Requests, Errors, Timeouts, Abort
fetch only rejects on network failure, so you must check response.ok yourself, and timeouts and cancellation are done with AbortController or AbortSignal.timeout.
Practice - SEO3 min
Internal Linking for SEO: Strategy and Best Practices
Internal links tell search engines which pages matter and how they relate: point more links at key pages through hubs, use descriptive anchors and leave no page without incoming links.
Practice - DevOps4 min
journalctl and logrotate: How to Read and Manage Linux Logs
Read systemd service logs with journalctl using -u, --since and -p, cap the journal size in journald.conf, and let logrotate rotate file logs in /var/log using rules in /etc/logrotate.d.
Practice - AI & automation3 min
How Neural Networks Work: A Simple Explanation
A neural network is many simple functions with adjustable weights; training compares each answer with the correct one and nudges the weights so the error gets smaller.
Basics - Programming3 min
Is PHP Still Worth Using? Modern PHP Explained
Yes, PHP is still relevant: versions 8+ added strict types, enums, attributes and JIT, a large share of the web runs on PHP, and Laravel and Symfony make solid web products fast; pick another language for real-time, ML or heavy computation.
Basics - Mobile development4 min
Mobile App Metrics: Retention, DAU/MAU, LTV and Churn Explained
The key metric for a young app is retention, whether people come back after a day, a week and a month; DAU/MAU shows habit strength, churn shows who leaves, and LTV shows lifetime revenue per user, which is only worth calculating once retention has stabilized.
Basics - Marketing & analytics4 min
Heatmaps and Session Recordings: How to Analyze User Behavior
Heatmaps show where users click, how far they scroll and where they linger, while session recordings show how one specific person moved through a page. Together they explain why your analytics numbers look the way they do and point to what to fix.
Basics - Design & UX4 min
Common Landing Page Design Mistakes and How to Fix Them
Most landing pages lose visitors to the same mistakes: an unclear hero, competing buttons, walls of text, a broken mobile layout and generic stock images. Each one can be fixed with a concrete change, without a full redesign.
Practice - Telegram & messengers4 min
Telegram Bot vs Mini App: Which Should You Build
A bot fits short, linear flows that feel like a conversation; a Mini App fits catalogs, complex forms and dashboards that need a real screen. Often the best answer is a bot with a Mini App inside.
Basics - E-commerce & CRM4 min
Types of Loyalty Programs: Points, Cashback, Tiers and More
Points and cashback suit frequent purchases, tiers suit stores with a clear core of regulars, paid membership works when you have a valuable perk like free delivery, and referrals work when customers happily recommend the product.
Basics - Security4 min
Is Public Wi-Fi Safe? Real Risks and How to Stay Protected
Thanks to ubiquitous HTTPS, public Wi-Fi is much safer than it used to be, but real risks remain — fake hotspots, phishing on login pages and unencrypted apps; a few basic rules plus a VPN where it matters are enough to work calmly.
Basics - Databases & data4 min
Power BI for Beginners: Build Your First Report
Your first Power BI report takes five steps: connect the sources, clean the data in Power Query, link tables into a star schema, write a few DAX measures and publish to the Power BI Service with scheduled refresh.
Practice - Hosting & cloud4 min
How to Migrate Business Email to a New Provider Without Losing Mail
Inventory mailboxes and aliases, recreate them at the new provider, copy old mail ahead of time, lower TTL and switch MX at a quiet hour, then keep the old mailboxes open a few more days and sync again so no message is lost.
Practice - IT careers3 min
Can You Get an IT Job Without a Degree?
Yes, many IT roles are open without a relevant degree because most companies judge skills and a portfolio, but a degree still matters in the public sector, some large corporations and for work visas.
Basics - Tools & no-code4 min
How to Self-Host n8n: Setup, Security and Updates
A solid setup is n8n in Docker Compose with PostgreSQL behind an HTTPS proxy, a saved N8N_ENCRYPTION_KEY, regular database backups and updates to a pinned version; queue mode with Redis is only needed once a single process is no longer enough.
Advanced - IT by industry4 min
How Hotels Get More Direct Bookings With a Booking Engine
To win more direct bookings, a hotel needs a fast booking engine on its website connected to the PMS, a clear reason to book direct, simple payment, and traffic from metasearch and remarketing.
Practice - Networks & office IT4 min
SD-WAN vs MPLS vs VPN: Connecting Branch Offices
A few branches usually do fine with site-to-site VPN over the internet, MPLS buys a predictable carrier link at the cost of flexibility, and SD-WAN pays off when you have many branches, several links per site, heavy cloud traffic and need central control.
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