Ubuntu 15.04 "Vivid Vervet". LXDE Desktop.
https://wiki.edubuntu.org/Lubuntu
The objective of the Lubuntu project is to create a variant of Ubuntu that is lighter, less resource hungry and more energy-efficient by using lightweight applications and LXDE, The Lightweight X11 Desktop Environment, as its default GUI.
Lubuntu is targeted at PC and laptop users running on low-spec hardware that, in most cases, just don't have enough resources for all the bells and whistles of the "full-featured" mainstream distributions. Members of the team take care of LXDE and other packages that are part of Lubuntu. Lubuntu received official recognition as a formal member of the Ubuntu family, commencing with Lubuntu 11.10.
System Requirements
We have done many tests and we've found out that Lubuntu can be installed on a Pentium II or Celeron system with 128 MB of RAM, but such a system would not perform well enough for daily use.
With 256MB - 384MB of RAM, the performance will be better and the system will be more usable.
With 512MB of RAM, you don't need to worry much.
The default "Desktop" installer requires 384-800 MB of RAM (depending on selected options.)
Lubuntu vs Ubuntu
Both Lubuntu and Ubuntu share Two Major Important Things:
Same Core System
Same Repositories
Lubuntu and Ubuntu belong to the same family and talking about each as totally different two systems is not correct since they have some things in common. Thus, we use the same Forum Area and share many Wiki Pages.
The differences between Lubuntu and Ubuntu are:
Different DE - Lubuntu uses LXDE while Ubuntu uses Unity as the default DE.
Different Default Applications
Other than that, they are the same. The DE is what makes Lubuntu a lightweight OS, and of course the selected applications too because we make sure to use the lightest applications which are not resource hungry.
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