CentOS Stream
CentOS Stream is the upstream preview of Red Hat Enterprise Linux. Learn how it replaced CentOS Linux, how it differs from RHEL and what that means for servers.
Knowledgebase
Clear answers to common hosting questions, written by our editors.
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By Maarten Soetens
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What Is an SMTP Relay?
An SMTP relay passes outgoing mail through another server. Learn what a relay or smarthost does, why hosts use them and why open relays are dangerous.
By Maarten Soetens
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Ecommerce Hosting Requirements
Ecommerce hosting requirements cover CPU, memory, database and uptime needs. Learn why carts, checkout and search strain servers more than a brochure site.
By Maarten Soetens
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Reverse Proxy
What is a reverse proxy? It sits in front of a website's servers to cache content, balance load, end HTTPS connections and hide the origin. See how it works.
By Maarten Soetens
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Object Storage and Buckets
Object storage keeps files as objects in buckets, each with its own metadata and key. Learn how it works, how it differs from disks and why it scales well.
By Maarten Soetens
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Render-Blocking Resources
Render-blocking resources are CSS and JavaScript files that stop a browser from showing a page. Learn why they block rendering and what async and defer change.
By Maarten Soetens
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What Is sudo?
What is sudo? Learn how it grants temporary administrator rights on Linux, what the sudoers file controls and why it is safer than logging in as root.
By Maarten Soetens
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Do You Need a Control Panel?
Do you need a control panel for a VPS? Compare panel and command-line management on convenience, resource use, cost, flexibility and lock-in.
By Maarten Soetens
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Static vs Dynamic Caching
Static vs dynamic content caching explained: static files are the same for every visitor, while dynamic content changes per person. See how edge caching helps.
By Maarten Soetens
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Website Malware Scanners
A website malware scanner checks files and pages for malicious code using signatures, heuristics and file comparison. Learn why a clean result is not proof.
By Maarten Soetens
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Performance Budget Explained
A performance budget sets limits on page weight, requests or timings so a site stays fast. Learn the main types of budgets and how teams use them.
By Maarten Soetens
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CDN Edge Locations
CDN edge locations are servers near visitors that hold cached copies of a site. Learn what points of presence (PoPs) are and why placement matters.
By Maarten Soetens