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Possible Duplicate:
How do I install LXDE / Lubuntu on Ubuntu?

I'm running ubuntu 11.10 unity my battery doesn't last more than 2 hours so i want to change from unity to lxde is it possible to install directly without formatting again?

if so can you give me instructions please

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marked as duplicate by fossfreedom, Jorge Castro, jrg, Stefano Palazzo Nov 29 '11 at 14:04

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
This question might be useful to you: askubuntu.com/questions/44062/… –  jokerdino Nov 29 '11 at 11:07
    
You got two questions here - I've edited your question to clarify... its really a duplicate. There are other similar battery life questions. If you dont feel they are applicable to you, please post a new question. –  fossfreedom Nov 29 '11 at 11:12

2 Answers 2

up vote 5 down vote accepted

Or

sudo apt-get install lubuntu-desktop

Install via the software center

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sudo add-apt-repository ppa:lxde/ppa
sudo apt-get update
sudo apt-get install lxde

Not without risk, you could encounter troubles with broken packages...

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