The flexibility of Ubuntu (and Linux in general) means that it not very difficult to create derivatives from it – and there a number of derivatives. Ubuntu derivatives could be created for a specific function or created with different desktop environment. To receive support from Canonical, though, the derivative has to be officially recognized by them.Lubuntu is one such derivative.
In my last review I considered Kubuntu 11.04 as an alternative to Ubuntu for disgruntled Ubuntu users. But there's another Ubuntu derivative that should be taken into consideration as well: Lubuntu 11.04.
Lubuntu uses the LXDE desktop environment, a much simpler and faster alternative to Unity, GNOME and KDE.
Lubuntu is now an official Ubuntu derivative as of 10.04, it is the LXDE version of Ubuntu just as Kubuntu is a KDE edition or Xubuntu is an XFCE variation. I was looking for a solid lightweight distro to run on that would still provide we with the power and flexibility I was used to from Ubuntu, thus it is only natural that I should choose an Ubuntu derivative.
Lubuntu 14.04 LTS Trusty Tahr is an official derivative of Ubuntu 14.04 LTS based on the Lightweight X11 Desktop Environment (LXDE). On this release, as the Xubuntu 14.04 Trusty Tahr, Lubuntu 14.04 also come with LTS version, it mean will be supported for 3 years.
It’s been a while since the buzz of the Open Source community has been wandering around Ubuntu and its various distro variants. Lubuntu, claimed to be a lighter version of Ubuntu, has now been officially recognised as a derivative of Ubuntu and will be released as Lubuntu 11.10 in October 2011.
Desktop Linux Reviews: "Lubuntu 10.04 is not an official derivative of Ubuntu; it is not supported by Canonical. However, it is serves a very important purpose by providing an Ubuntu distro geared toward older or less powerful computers."