# Supported tags and respective `Dockerfile` links

-	[`12.04.5`, `12.04`, `precise-20150320`, `precise` (*precise/Dockerfile*)](https://github.com/tianon/docker-brew-ubuntu-core/blob/662c6317181e3a0f53abdee253d68307a62f3fd3/precise/Dockerfile)
-	[`14.04.2`, `14.04`, `trusty-20150320`, `trusty`, `latest` (*trusty/Dockerfile*)](https://github.com/tianon/docker-brew-ubuntu-core/blob/662c6317181e3a0f53abdee253d68307a62f3fd3/trusty/Dockerfile)
-	[`14.10`, `utopic-20150319`, `utopic` (*utopic/Dockerfile*)](https://github.com/tianon/docker-brew-ubuntu-core/blob/662c6317181e3a0f53abdee253d68307a62f3fd3/utopic/Dockerfile)
-	[`15.04`, `vivid-20150319.1`, `vivid` (*vivid/Dockerfile*)](https://github.com/tianon/docker-brew-ubuntu-core/blob/662c6317181e3a0f53abdee253d68307a62f3fd3/vivid/Dockerfile)

For more information about this image and its history, please see the [relevant manifest file (`library/ubuntu`)](https://github.com/docker-library/official-images/blob/master/library/ubuntu) in the [`docker-library/official-images` GitHub repo](https://github.com/docker-library/official-images).

# Ubuntu

## sources.list

	$ docker run ubuntu:14.04 grep -v '^#' /etc/apt/sources.list
	
	deb http://archive.ubuntu.com/ubuntu/ trusty main restricted
	deb-src http://archive.ubuntu.com/ubuntu/ trusty main restricted
	
	deb http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted
	deb-src http://archive.ubuntu.com/ubuntu/ trusty-updates main restricted
	
	deb http://archive.ubuntu.com/ubuntu/ trusty universe
	deb-src http://archive.ubuntu.com/ubuntu/ trusty universe
	deb http://archive.ubuntu.com/ubuntu/ trusty-updates universe
	deb-src http://archive.ubuntu.com/ubuntu/ trusty-updates universe
	
	
	deb http://archive.ubuntu.com/ubuntu/ trusty-security main restricted
	deb-src http://archive.ubuntu.com/ubuntu/ trusty-security main restricted
	deb http://archive.ubuntu.com/ubuntu/ trusty-security universe
	deb-src http://archive.ubuntu.com/ubuntu/ trusty-security universe

\-

	$ docker run ubuntu:12.04 cat /etc/apt/sources.list
	
	deb http://archive.ubuntu.com/ubuntu/ precise main restricted
	deb-src http://archive.ubuntu.com/ubuntu/ precise main restricted
	
	deb http://archive.ubuntu.com/ubuntu/ precise-updates main restricted
	deb-src http://archive.ubuntu.com/ubuntu/ precise-updates main restricted
	
	deb http://archive.ubuntu.com/ubuntu/ precise universe
	deb-src http://archive.ubuntu.com/ubuntu/ precise universe
	deb http://archive.ubuntu.com/ubuntu/ precise-updates universe
	deb-src http://archive.ubuntu.com/ubuntu/ precise-updates universe
	
	
	deb http://archive.ubuntu.com/ubuntu/ precise-security main restricted
	deb-src http://archive.ubuntu.com/ubuntu/ precise-security main restricted
	deb http://archive.ubuntu.com/ubuntu/ precise-security universe
	deb-src http://archive.ubuntu.com/ubuntu/ precise-security universe

# Supported Docker versions

This image is officially supported on Docker version 1.6.0.

Support for older versions (down to 1.0) is provided on a best-effort basis.

# User Feedback

## Documentation

Documentation for this image is stored in the [`ubuntu/` directory](https://github.com/docker-library/docs/tree/master/ubuntu) of the [`docker-library/docs` GitHub repo](https://github.com/docker-library/docs). Be sure to familiarize yourself with the [repository's `REAMDE.md` file](https://github.com/docker-library/docs/blob/master/README.md) before attempting a pull request.

## Issues

If you have any problems with or questions about this image, please contact us through a [GitHub issue](https://github.com/tianon/docker-brew-ubuntu-core/issues).

You can also reach many of the official image maintainers via the `#docker-library` IRC channel on [Freenode](https://freenode.net).

## Contributing

You are invited to contribute new features, fixes, or updates, large or small; we are always thrilled to receive pull requests, and do our best to process them as fast as we can.

Before you start to code, we recommend discussing your plans through a [GitHub issue](https://github.com/tianon/docker-brew-ubuntu-core/issues), especially for more ambitious contributions. This gives other contributors a chance to point you in the right direction, give you feedback on your design, and help you find out if someone else is working on the same thing.