What Is a VPS?

A VPS in one paragraph

A hosting company runs powerful physical servers and splits each one into several virtual machines. Each virtual machine behaves like a separate computer: it boots its own operating system, usually Linux, gets its own public IP address and has a fixed amount of RAM, CPU and disk space set aside for it. That virtual machine is your VPS.

You log in as root, the administrator account, so you can install any software, open any port and change any setting. The other side of that freedom: you are the one who keeps the system updated and secure.

How virtualisation works

A piece of software called a hypervisor sits on the physical server and shares its hardware between the virtual machines. There are two common approaches:

• Full virtualisation, such as KVM. Each VPS runs its own kernel, the core of the operating system. It is isolated from its neighbours, can load its own kernel modules, run its own firewall rules and run Docker without restrictions.
• Container-based virtualisation, such as OpenVZ or LXC. All the "servers" share the host's kernel. It is lighter, but you cannot change the kernel, and some software, Docker included, may not run or needs special settings.

When you compare offers, check which one you are buying. "KVM" in the description means a real virtual machine with its own kernel.

VPS compared with other hosting

The choice between the first two is covered in detail in VPS vs shared hosting. In short: if you only need a website, shared hosting is simpler and cheaper; a VPS is for when you need control.

What people run on a VPS

• Websites and web apps with your own stack: nginx or Apache, PHP, Node.js, Python, a database you tune yourself.
• Bots and background workers that must stay online: Discord and Telegram bots, schedulers, queue workers.
• Game servers with full control over mods and ports, or a panel such as Pterodactyl for several of them. See how to set up a VPS for game servers.
• Containers with Docker and Docker Compose.
• Private tools: Git hosting, file sync, monitoring, a staging copy of your site, a VPN endpoint.

What a VPS is not good for: anything that needs a graphics card, and large email campaigns, which need a dedicated email-sending service.

How to connect to a VPS

You manage a Linux VPS over SSH, an encrypted connection to its command line. After you order, you receive the server's IP address and the root login details.

1. Open a terminal. On macOS and Linux, open Terminal. Windows 10 and 11 include an SSH client: open PowerShell or Windows Terminal.
2. Connect:

   ssh root@YOUR_SERVER_IP

   The first time, confirm the server's fingerprint by typing yes, then enter the password.
3. Or use PuTTY on Windows, if you prefer a window to a command: download it from the official PuTTY site, enter the IP address, keep port 22 and click Open.
4. Update the system right away (on Ubuntu or Debian):

   apt update && apt upgrade -y

5. Switch to an SSH key instead of a password. Create one on your computer and copy it to the server:

   ssh-keygen -t ed25519
   ssh-copy-id root@YOUR_SERVER_IP

If you ever lock yourself out, for example with a firewall rule, the VPS control panel has a console that works in the browser without SSH.

How much RAM and CPU do you need?

RAM is usually the first limit you hit, so size for it. Storage type matters too: NVMe is much faster than older SATA disks for databases. Start with what you need now; a VPS can be upgraded later without reinstalling.

A VPS on HytHost

HytHost VPS plans run on KVM, so every VPS has its own kernel and runs Docker and custom firewall rules without restrictions. Each one comes with full root access, SSD storage, a public IPv4 address and DDoS protection.

• Operating system: you pick it at checkout, including Ubuntu 24.04 and 22.04, Debian, AlmaLinux and Rocky Linux, and you can reinstall it later from the control panel.
• Access: the login details arrive by email after payment. The control panel also gives you power controls and a browser console.
• Upgrades: move to a bigger plan from the client area and pay only the prorated difference.

A HytHost VPS is unmanaged by default: the operating system and everything you install on it are yours to run. If you only need a website, web hosting with cPanel is the easier choice.