Category
VPS hardening, SSH, firewalls, private networking, and access control for servers.
Too many certificates already issued for exact set of domains means you hit Let's Encrypt's 5-per-week duplicate limit. Here is why shorter certificate lifetimes make this more likely, and the real fix, not the advice that makes it worse.
WordPress 7.0 raised the minimum PHP version to 7.4, but some sites online are also claiming it raised the MySQL requirement, and one of them later corrected that claim. Here is what actually changed, straight from WordPress's own official announcement.
Let's Encrypt is shortening its certificate lifetimes, moving from 90 days down to 64 days by February 2027, with 45-day and even 6-day options already available. If your renewal script still assumes a 30-day buffer, here is why that assumption is starting to run out of room.
PHP 8.1 stopped getting security patches on December 31, 2025, and roughly half of top PHP sites are reportedly still running an end of life version. Here is how to check what you are actually running, and how to upgrade without breaking your WordPress site or Laravel app.
Ubuntu 26.04 LTS quietly made sudo-rs the default sudo. If your sudoers rules use a wildcard inside command arguments, they will silently stop matching. Here is what changed and how to fix it.
Enabling UFW without allowing SSH first is one of the most common ways people lock themselves out of a VPS. Here's the correct order, the gotcha if you've changed your SSH port, and how to recover if it's already happened.
Close port 22 to the public internet and SSH to your VPS only over your private Tailscale network instead. Setup steps, what it actually costs a solo developer (usually $0), and the single-point-of-failure trade-off worth planning for before you rely on it.
Disable SSH password login and switch to key-only authentication on a VPS — including the cloud-init config override that silently breaks this on most guides.
