Anime Girl Ubuntu wallpaper

Free software here includes only software that meets the Ubuntu licensing requirements, which roughly correspond to the Debian Free Software Guidelines. There is one exception for the Main category, however - it contains firmware and fonts which are not allowed to be modified, but are included because their distribution is otherwise unencumbered.
Non-free software is usually unsupported (Multiverse), but some exceptions (Restricted) are made for very important non-free software. Supported non-free software includes device drivers that can be used to run Ubuntu on some current hardware, such as binary-only graphics card drivers. The level of support in the Restricted category is more limited than that of Main, since the developers may not have access to the source code. It is intended that Main and Restricted should contain all software needed for a general-use Linux system. Alternative programs for the same tasks and programs for specialized applications are placed in the Universe and Multiverse categories.