Ubuntu is built on Debian. Both use apt and .deb packages, share most tooling and run the same software. Yet they make different trade-offs, and the choice affects how often you upgrade, how new your software is, and what’s installed by default. Here’s a practical comparison for servers.
Quick answer
- Ubuntu LTS if you want predictable two-year releases, five years of standard support (up to 12 with Ubuntu Pro), the largest pool of tutorials, and vendor support for software that targets Ubuntu first.
- Debian stable if you want a lean, conservative, community-run system with no commercial upsell, and you’re comfortable with slightly older packages.
Both are excellent. For most web servers, the difference is smaller than the debates suggest.
Side by side
| Ubuntu Server LTS | Debian stable | |
|---|---|---|
| Backed by | Canonical (company) | Debian Project (community) |
| Release cadence | LTS every 2 years (April of even years) | About every 2 years, “when it’s ready” |
| Support | 5 years standard; up to 10+ with Ubuntu Pro (ESM) | ~3 years + ~2 years LTS (volunteer/sponsored) |
| Package age at release | Newer (frozen a few months before release) | Older (long freeze for stability) |
| Kernel updates within a release | HWE kernels available | Backports kernels available |
| Default extras | snapd, cloud-init, unattended-upgrades | Minimal, no snap |
| Memory footprint (idle) | Slightly higher | Slightly lower |
| Docs and tutorials | The most of any distro | Plenty, and Ubuntu guides mostly apply |
| Commercial support | Available from Canonical | From third parties |
Stability and freshness
Debian stable’s packages go through a long testing period, so they’re very stable, but by the end of a release cycle they can be two years or more behind upstream. Ubuntu LTS freezes later, so it starts with somewhat newer versions.
In practice, critical web software often comes from vendor repositories on either distro: Docker, PostgreSQL (PGDG), Node.js (NodeSource), PHP (Ondřej Surý’s packages for Debian, or his PPA for Ubuntu), Nginx mainline. That makes base-package freshness less decisive. See PPAs and repositories.
Defaults that differ
- snap: Ubuntu uses snaps for some software (LXD, sometimes Certbot), and
snapdruns by default. Some admins remove it. Debian doesn’t use snaps. See snap packages. - rsyslog: Debian 12+ installs only journald by default. Ubuntu still ships rsyslog.
- Netplan (Ubuntu) vs
/etc/network/interfaces(Debian, ifupdown) for network config. See netplan. - sudo: Ubuntu installs disable root password login and give the first user sudo. Debian asks during install.
- Ubuntu Pro messages appear in
aptand the MOTD. They can be turned off.
Upgrades
Both upgrade in place to the next release:
- Ubuntu:
do-release-upgrade. See upgrade Ubuntu. - Debian: switch the apt sources and
apt full-upgrade. See upgrade Debian.
Ubuntu’s longer support (with Pro) means fewer forced upgrades. Debian’s five-year combined lifecycle is also comfortable for most servers.
Performance
On identical hardware, web and database performance is effectively the same. They use similar kernels and the same software. Debian’s lighter default install saves some RAM (tens of MB), which only matters on very small VPS plans.
Choose by use case
| Use case | Suggestion |
|---|---|
| Beginner following tutorials | Ubuntu LTS |
| Software that officially supports “Ubuntu” only | Ubuntu LTS |
| Minimal, long-running service with few changes | Debian |
| Docker host | Either, both are first-class for Docker |
| Small VPS (1–2 GB RAM) | Debian (slightly lighter), or Ubuntu with snap removed |
| Kubernetes / cloud-native tools | Ubuntu is the most common target |
| Wanting no corporate involvement | Debian |
If you prefer the RHEL family instead, see AlmaLinux and Rocky Linux, or the broader server distro comparison.
On VPS.DO
Both are available on every VPS.DO VPS: Ubuntu 20.04, 22.04 and 24.04 LTS, and Debian 11 and 12, with KVM virtualization and full root access. You can switch any time with the OS reinstall in the control panel, which erases the disk, so back up first. See Ubuntu VPS and Debian VPS.
Quick reference
| Question | Ubuntu | Debian |
|---|---|---|
| Release upgrade tool | do-release-upgrade |
edit sources + apt full-upgrade |
| Network config | Netplan | ifupdown / systemd-networkd |
| Newer kernel | HWE | backports |
| Extended support | Ubuntu Pro (ESM) | Debian LTS / ELTS |
Related: first 10 minutes on a new VPS and check Linux version.