Before we talk more about Operating System based on Linux kernel Ubuntu, let's we find out about the ubuntu history first
Quoted from wikipedia
Ubuntu was my favorite operating system, I have used it for 2 years and it's very supporting my job. I can use terminal to remote ssh to my servers. Ubuntu supported 32 and 64 version and also have many varians, you can find it on diagram in this link https://upload.wikimedia.org/wikipedia/commons/7/79/UbuntuFamilyTree1210.svgUbuntu is built on Debian's architecture and infrastructure, to provide Linux server, desktop, phone, tablet and TV operating systems.[19] Ubuntu releases updated versions predictably every six months,[8] and each release receives free support for nine months (eighteen months prior to 13.04)[20] with security fixes, high-impact bug fixes and conservative, substantially beneficial low-risk bug fixes.[21] The first release was in October 2004.
Starting with Ubuntu 6.06, every fourth release, one release every two years, receives long-term support (LTS).[8] Long-term support includes updates for new hardware, security patches and updates to the 'Ubuntu stack' (cloud computing infrastructure).[16] The first LTS releases were supported for three years on the desktop and five years on the server; since Ubuntu 12.04 LTS, desktop support for LTS releases was increased to five years as well.[22][23][24] LTS releases get regular point releases with support for new hardware and integration of all the updates published in that series to date.[25]Ubuntu packages are based on packages from Debian's unstable branch. Both distributions use Debian's deb package format and package management tools (APT and Ubuntu Software Center). Debian and Ubuntu packages are not necessarily binary compatible with each other, however; packages may need to be rebuilt from source to be used in Ubuntu.[26] Many Ubuntu developers are also maintainers of key packages within Debian. Ubuntu cooperates with Debian by pushing changes back to Debian,[27] although there has been criticism that this does not happen often enough. Ian Murdock, the founder of Debian, had expressed concern about Ubuntu packages potentially diverging too far from Debian to remain compatible.[28] Before release, packages are imported from Debian unstable continuously and merged with Ubuntu-specific modifications. One month before release, imports are frozen, and packagers then work to ensure that the frozen features interoperate well together.Ubuntu is currently funded by Canonical Ltd. On 8 July 2005, Mark Shuttleworth and Canonical announced the creation of the Ubuntu Foundation and provided an initial funding of US$10 million. The purpose of the foundation is to ensure the support and development for all future versions of Ubuntu. Mark Shuttleworth describes the foundation goal as to ensure the continuity of the Ubuntu project.[29]On 12 March 2009, Ubuntu announced developer support for 3rd-party cloud management platforms, such as those used at Amazon EC2.[30]
The diagram explain how ubuntu developed from time to time and grow very quickly because ubuntu has many community. They are ready contribute to developing ubuntu in order to perfect like now. If any bug they will fix it quickly and release new ubuntu version thats why ubuntu growth so fast.
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