I want to install lubuntu on my current (pre-existing) Ubuntu Install because of it's light-weight footprint.
Can I preserve currently installed apps after installation?
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For 11.10 and 12.04, you'll need to do this through a terminal.
Open up a terminal (Super, then type
Terminal into the dash), then run the following:
sudo apt-get update && sudo apt-get install lubuntu-desktop
Or install via the Software Center:
You will get asked to enter your password, and you will also be asked to choose between
LXDM - I suggest using
Once that is done, log out, and then select
Lubuntu as your desktop session:
Lubuntu uses the LXDE desktop enviroment, which is less resource intensive than GNOME2. Other than that they are the same.
To install Lubuntu you need to do this:
Go to the Synaptic package manager and search for:
lubuntu-desktop lubuntu-restricted-addons lubuntu-artwork lubuntu-core lubuntu-default-settings lubuntu-icon-theme plymouth-lubuntu-logo lubuntu-restricted-extras
(lubuntu-desktop is a meta package so it should install all the other packages) Install it and well...that's it.
Now whenever you login in GDM you can choose from Ubuntu and Lubuntu
You can search it on the Ubuntu Software Center as well.