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Use this tag in addition to the 'linux' tag for questions where integration in the default Ubuntu interface is a requirement. If you're just looking for Linux software and happen to be running Ubuntu, use only the 'linux' tag.

Ubuntu is a computer operating system derived from the Debian GNU/Linux distribution and distributed as free and open source software.

There is a Stack Exchange site dedicated to Ubuntu which is a good place to ask any Ubuntu-related questions if you have questions which are not asking for software recommendations.

All Linux software runs on any distribution. Therefore most questions asking for software to run on Ubuntu should be tagged with and not , since answers would be equally useful to people running other distributions. Use the tag only for questions that are specific to Ubuntu, e.g. if you're looking for a Unity plug-in.