Choosing a Linux Distribution for a Cloud Server

The realistic shortlist

Ubuntu LTS is the default for good reasons: nearly every tutorial assumes it, most vendor packages target it first, and the five-year window fits the life of a typical server. Choosing it is rarely wrong.

Support lifetime is the decision that bites

A distribution past end of life stops receiving security patches. Nothing visibly breaks; the server simply becomes progressively less safe. Upgrading across major versions on a production machine that has been running for four years is genuinely unpleasant.

1. Pick a release with a support window longer than the server’s expected life.
2. Record the end-of-life date somewhere you will see it.
3. Prefer rebuilding on a new release over in-place major upgrades, which is far easier if your configuration is in code.
4. Never deploy something new onto a release that is already near end of life.

That third point is the important one. If the server can be rebuilt from a script, distribution upgrades stop being a project.

Fresh packages versus stable packages

Debian Stable ships older versions deliberately, patched for security but not updated for features. That is exactly right for infrastructure you want to leave alone, and frustrating when you need a recent runtime.

The usual resolution is not to change distribution. It is to get the runtime from its own source — the language’s official repository, a version manager, or a container — and let the distribution handle only the base system.

Practical differences you will notice

• Package manager — apt on Debian and Ubuntu, dnf on Rocky and Alma, apk on Alpine. Command syntax differs; concepts do not.
• Firewall front end — ufw on Ubuntu, firewalld on the RHEL family, raw nftables on Alpine.
• Default security module — AppArmor on Ubuntu and Debian, SELinux on Rocky and Alma. SELinux is stricter and causes more confusing permission failures until you learn to read its logs.
• libc — Alpine uses musl rather than glibc, which occasionally breaks binaries compiled against glibc. Usually fine, occasionally a long afternoon.
• Init and logging — systemd everywhere except Alpine, which uses OpenRC.

What actually decides it

1. What does your team already run? Consistency is worth more than any technical difference here.
2. What does your vendor or framework document? Following the supported path saves real time.
3. How long will this server live? Longer life favours a longer support window.
4. Do you need SELinux or specific compliance tooling? That points at Rocky or Alma.
5. Is this a container base image rather than a host? Alpine or a slim Debian image.

If none of these give a clear answer, use Ubuntu LTS and spend the time saved on something that matters more.

Common questions

Where to go next

See the first hour on a new cloud server and hardening basics.