OSTree 2014.4 Description:
OSTree is an open source and freely distributed command-line utility implemented in C and designed for managing bootable, versioned and immutable file system trees. It is also known as the GNOME OS build tool. The software is designed in such a way that it takes over the role of a traditional package managers, such as dpkg and rpm. However, it is not a package system or a utility for managing full disk images. It's actually a blend of the disadvantages and advantages of both. This is the question that many of you would ask from the beginning, so we feel obliged to tell you that the well known GNOME Continuous integration system uses the OSTree package as a native deployment mechanism, among many other projects.