# Ubuntu project

> This documentation provides guidance for contributors to and maintainers of the Ubuntu Linux distribution. It covers processes and concepts, as well as project governance and team workflows. There are instructions for packaging, merging, proposed migrations, autopkgtests, and many other procedures for maintaining the Ubuntu Archive and releasing the distribution.


2026

## Pages in this subsection

- [Merging](https://documentation.ubuntu.com/project/contributors/merging.md): **Merging** (also called “delta rebasing”) is the process of taking all Ubuntu changes (Ubuntu delta...
- [Preliminary steps](https://documentation.ubuntu.com/project/contributors/merging/preliminary-steps.md): Prepare for the merging procedure by cloning the required repository and filing a merge bug.
- [Merge process](https://documentation.ubuntu.com/project/contributors/merging/merge-process.md): Perform the merge using the  tool.
- [Fix the changelog](https://documentation.ubuntu.com/project/contributors/merging/fix-the-changelog.md): We may need to adjust the title of this page. "Fix the changelog" is quite a generic statement that ...
- [Upload a PPA](https://documentation.ubuntu.com/project/contributors/merging/upload-a-ppa.md): Following a successful merging procedure, upload the updated package to a PPA for building.
- [Test the new build](https://documentation.ubuntu.com/project/contributors/merging/test-the-new-build.md): Before submitting a merge proposal to add the merged package to the Archive, test it to ensure there...
- [`git-ubuntu` merge proposal](https://documentation.ubuntu.com/project/contributors/merging/git-ubuntu-merge-proposal.md): Following a merge and testing, submit a merge proposal to include the updated package in the Archive...
- [How to merge manually](https://documentation.ubuntu.com/project/contributors/merging/merge-manually.md): In case the regular `git-ubuntu`-based Merge process fails, follow these instructions to perform the...
- [Merge cheat sheet](https://documentation.ubuntu.com/project/contributors/merging/merge-cheat-sheet.md): 1. `rmadison <package_name>`

## Optional

- [Top-level llms.txt](https://documentation.ubuntu.com/project/llms.txt): Complete documentation index.