The CentOS operating system has several features that restrict users’ resource consumption. They help web hosts and server administrators to fairly distribute resources on shared servers and to create tiered account systems. Without quotas, rogue users can—accidentally or deliberately—use more than their fair share, hurting their neighbors’ web hosting performance. Inode quotas limit the number of files a user can create. In this article, we explore what inodes are, how to display inode quotas in …

Many of the most complex systems on the web deal with naming and identity verification. If you manage a website, you’re already familiar with web URLs, IP addresses, signed SSL certificates, and perhaps cryptocurrency addresses. But what if you could have a single name that links to all of your online identities, an identifier that is uniquely yours and tied to your social media handles and domain names? And what if, instead of web addresses …

NFTs (non-fungible tokens) hit the headlines recently when an artist named Beeple sold a digital image collage for $69 million. Depending on your taste in art, you might find Beeple’s image compelling, but would you pay millions for it? After all, you can “own” a copy of Everydays — The First 5000 Days by downloading the constituent images (although you might violate copyright laws).  That’s the problem NFTs …

The domain name system (DNS) is a part of the internet’s plumbing users may not often think about unless it stops working. It’s a different story for web hosting providers and site owners; they deal with DNS directly because they depend on it to translate human-friendly web addresses into machine-friendly IP addresses. Every website has a domain name registered with a domain name registrar. The registrars work with registry operators, which manage registries—databases of domain …