Skip to content

Improve documentation of core snap #253

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
degville merged 1 commit into from
Aug 7, 2025
Merged

Improve documentation of core snap #253

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions docs/explanation/core-elements/snaps-in-ubuntu-core.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -35,8 +35,8 @@ The [gadget snap](/reference/gadget-snap-format) is responsible for defining and
The [base snap](https://snapcraft.io/docs/base-snaps) provides the run-time environment with a minimal set of libraries that are common to most applications. Base snaps mirror Ubuntu LTS releases and include core20, built from Ubuntu 20.04 LTS, core18 based on Ubuntu 18.04 LTS, and core, based on Ubuntu 16.04 LTS. One of them, selected with the model assertion, also serves as the root file system for the Ubuntu Core system.
For historical reasons the core snap has a different specific type: core.
1. **snapd**: The snap daemon</br>
The core16, core18 and core20+ base snaps do not include the snap daemon (core, however, does). Instead, they package the daemon as an upgradeable snap of this type.
The core16 base snap is supported inline with the wider [Ubuntu release cycle](https://ubuntu.com/about/release-cycle) and cannot run the latest versions of the daemon.
Since core18, base snaps do not include the snap daemon. Instead, the snapd daemon is packaged as a separate upgradeable snap.
The core base snap used in Ubuntu Core 16 includes the snapd daemon, which therefore cannot be separately upgraded and is supported inline with the wider [Ubuntu release cycle](https://ubuntu.com/about/release-cycle).
1. **app**: Applications, daemons and tools</br>
Packages applications, pulled from multiple upstream sources using diverse build systems. The snapd daemon is itself installed as a snap (except with an old core, where it's included).

Expand Down