A VPS you stood up six months ago and rarely log into is the most dangerous machine you own. It is still serving traffic, still listening on its open ports, and still running whatever package versions it had the day you walked away — including the ones with public exploits published last week. Patch hygiene is the …

Out of the box, Nginx is fast and stable but tells the world more than it should and accepts more abuse than it needs to. It advertises its exact version in every response header, negotiates TLS protocols that should have been retired years ago, and lets a single misbehaving client hammer an expensive endpoint as hard …

There is no longer any reason to serve a website over plain HTTP. A trusted TLS certificate costs nothing, browsers flag sites without one as "Not Secure," and search engines treat HTTPS as a ranking signal. The piece that used to be painful — issuing, installing, and renewing certificates every ninety days — is now …

The backup you never tested is not a backup — it is a hope. Every administrator who has lost data has a version of the same story: the job had been "running fine for months," and the first time anyone tried to restore from it, the files were empty, stale, or never there at all. The fix is not exotic software. rsync and …

The moment an Ubuntu VPS gets a public IP, automated bots start knocking on port 22. Within hours you will see thousands of failed login attempts in your auth log — scripts cycling through root, admin, ubuntu, and a dictionary of weak passwords. SSH is the front door to your server, and the default configuration leaves …

A firewall decides which network ports on your VPS the outside world can reach. Without one, every service you start — a database, a stray dev server, a debugging tool — is exposed to the entire internet the instant it binds to a public interface. Ubuntu ships with UFW (Uncomplicated Firewall), a friendly front end to …

Hardening SSH with keys stops password attacks from succeeding, but the attempts keep coming — bots will hammer your server thousands of times a day regardless. Fail2ban turns that noise into action: it watches your log files, spots the pattern of repeated failures from a single IP, and tells the firewall to ban that …

Most services on a Linux VPS run with far more power than they need. A web app that only has to read its own files and listen on a port often runs able to write anywhere on the filesystem, see every other process's temp files, and acquire new privileges at will. If that service is ever compromised, all of that latent …

A small VPS — 1 or 2 GB of RAM, a couple of vCPUs — ships with kernel defaults tuned for a generic desktop or a large server, neither of which describes your box. A handful of sysctl and limit adjustments can make that same hardware noticeably more responsive under load: less needless swapping, more simultaneous …

Running a VPN on a Linux server is a different problem than running one on a laptop. You need a proper CLI client that works headless, a protocol that holds up under long uptime, a kill switch that actually blocks traffic when the tunnel drops, and ideally some way to build a private network between multiple servers …