What Is RHEL?
Red Hat Enterprise Linux (RHEL) is a commercial Linux distribution with long support and paid subscriptions. Learn how RHEL works and why businesses choose it.
Knowledgebase
Clear answers to common hosting questions, written by our editors.
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By Maarten Soetens
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NGINX FastCGI Cache
NGINX FastCGI cache stores PHP-FPM responses inside the NGINX web server. Learn how it works, how it differs from Varnish and when it fits best.
By Maarten Soetens
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Self-Host LLM Requirements
Self-host LLM requirements explained: GPU memory, model size, inference servers and throughput. Learn what it takes to run an LLM on your own server.
By Maarten Soetens
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What Is a Shopping Cart?
Shopping cart software holds the items a shopper picks, calculates totals, tax and shipping, applies coupons and passes the order on to checkout.
By Maarten Soetens
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Free vs Premium Themes
Free vs premium WordPress themes compared on support, updates, features and lock-in, with the questions to ask before you pay for a theme or its license.
By Maarten Soetens
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Site Selection
Data center site selection explained: how builders weigh natural hazards, power supply, connectivity, climate and regulation before choosing a build site.
By Maarten Soetens
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Why Websites Get Hacked
Why do websites get hacked? Learn the main motives, such as spam, data theft and server resources, and the common entry points attackers use.
By Maarten Soetens
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Soft 404 Errors
A soft 404 is a page that returns a 200 OK status but looks empty or missing to search engines. Learn the common causes and why they confuse indexing.
By Maarten Soetens
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Post-Quantum Cryptography and TLS
Post quantum TLS explained: why quantum computers threaten current key exchange, the harvest now, decrypt later risk and hybrid key exchange in HTTPS.
By Maarten Soetens
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Linux File Permissions
Linux file permissions explained: owner, group and others, read, write and execute rights, and how to read symbolic notation such as -rw-r--r-- in ls output.
By Maarten Soetens
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Posts vs Pages
Posts vs pages WordPress: posts are dated entries in a blog feed, while pages hold timeless content. Learn the differences and when to use each one.
By Maarten Soetens
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Database Normalization
Database normalization organizes tables to cut duplicate data. Learn what 1NF, 2NF and 3NF mean, see a simple example, and when to denormalize.
By Maarten Soetens