Release Channels

The LeiOS repository publishes packages in two suites. Your system follows one of them, set by the Suites line in /etc/apt/sources.list.d/leios.sources.

Suite	What you get
`testing`	New package releases as soon as they are published. Updates arrive faster but have had less review.
`stable`	Only packages that were reviewed and promoted, frozen into versioned LeiOS releases.

The current LeiOS images are pre-release builds and follow testing.

How a package reaches you

Published. A developer uploads a new package release on the Developer Hub. It lands in testing right away.
Promoted. When the release has proved itself, the developer requests promotion to stable, and a LeiOS admin reviews the request.
Released. Approved packages are included in the next LeiOS release: a snapshot of the stable suite that is then published as stable.

LeiOS releases are versioned by date as YYYY.MM.NNN: the year, the month, and a running number within that month, for example 2026.10.001.

Switching channels

To follow the stable channel, change Suites: testing to Suites: stable in /etc/apt/sources.list.d/leios.sources, then update:

sudo sed -i 's/^Suites: testing$/Suites: stable/' /etc/apt/sources.list.d/leios.sources
sudo apt update
sudo apt full-upgrade

Only switch to stable once a stable LeiOS release has been announced on the blog. Before that, the suite may not exist yet and apt update fails.

Switching from testing to stable does not downgrade packages that are already installed. You keep the newer testing versions until stable catches up.