Ubuntu is derived from Debian, so they share the same apt tooling and most commands. But there are real differences that matter on a server.
Package freshness
Ubuntu ships newer software and a new release every six months (with LTS every two years). Debian stable prioritises thorough testing, so packages are older but extremely well-tested.
Release cadence and support
- Ubuntu LTS: 5 years of support, predictable 2-year cadence, commercial backing from Canonical.
- Debian stable: roughly 3 years of support (with LTS extensions), released "when it's ready".
Footprint and philosophy
A minimal Debian install is lean and includes only free software by default. Ubuntu bundles a bit more and offers commercial add-ons.
Which to choose
- Want the newest packages and the biggest ecosystem of tutorials? Ubuntu LTS.
- Want a minimal, ultra-stable base? Debian.
Both are excellent server choices, and OneHost supports both — so you can pick the philosophy that fits your team.