Can't install maven plugin for eclipse on Ubuntu 12.04 - eclipse

Question

I tried install at eclipse Indigo - Version: 3.7.2, Maven plugin.
Here step by step what I did:
Help => Install new software... => Work with => add http://download.eclipse.org/technology/m2e/releases location => Tick Maven integration for eclipse => next.
But it wasn't finished and pop up:
Cannot complete the install because one or more required items could not be found.
Software being installed: m2e - Maven Integration for Eclipse 1.4.0.20130601-0317 (org.eclipse.m2e.feature.feature.group 1.4.0.20130601-0317)
But when I looking for at Window => Preferences, Maven doesn't exist.
I want to update eclipse to kepler version. I added needs repository to
Window - Preferences - Install/Update - Available Softsarve..
And when I went to Help - Check for Updates I saw next error:
Cannot complete the install because of a conflicting dependency.
Software being installed: Equinox p2 RCP Management Facilities Source 1.2.0.v20130604-2046 (org.eclipse.equinox.p2.rcp.feature.source.feature.group 1.2.0.v20130604-2046)
Software currently installed: Eclipse Platform 3.7.0.I20110613-1736 (org.eclipse.platform.ide 3.7.0.I20110613-1736)
Only one of the following can be installed at once:
Simple Configurator Manipulator 2.0.0.v20130327-2119 (org.eclipse.equinox.simpleconfigurator.manipulator 2.0.0.v20130327-2119)
Simple Configurator Manipulator 2.0.0.dist (org.eclipse.equinox.simpleconfigurator.manipulator 2.0.0.dist)
Cannot satisfy dependency:
From: Equinox p2 Core Function 1.0.1.dist-8291FXcFLhV8CJ871602A41 (org.eclipse.equinox.p2.core.feature.feature.group 1.0.1.dist-8291FXcFLhV8CJ871602A41)
To: org.eclipse.equinox.simpleconfigurator.manipulator [2.0.0.dist]
Cannot satisfy dependency:
From: Equinox p2 Core Function 1.2.0.v20130604-2046 (org.eclipse.equinox.p2.core.feature.feature.group 1.2.0.v20130604-2046)
To: org.eclipse.equinox.simpleconfigurator.manipulator [2.0.0.v20130327-2119]
Cannot satisfy dependency:
From: Equinox p2 RCP Management Facilities 1.2.0.v20130604-2046 (org.eclipse.equinox.p2.rcp.feature.feature.group 1.2.0.v20130604-2046)
To: org.eclipse.equinox.p2.core.feature.feature.group [1.2.0.v20130604-2046]
Cannot satisfy dependency:
From: Equinox p2 RCP Management Facilities Source 1.2.0.v20130604-2046 (org.eclipse.equinox.p2.rcp.feature.source.feature.group 1.2.0.v20130604-2046)
To: org.eclipse.equinox.p2.rcp.feature.feature.group [1.2.0.v20130604-2046]
Cannot satisfy dependency:
From: Equinox p2 Provisioning for IDEs. 2.1.2.dist-6-Bk8lt6MLqLsEf6-RFpFIpRdhQG (org.eclipse.equinox.p2.user.ui.feature.group 2.1.2.dist-6-Bk8lt6MLqLsEf6-RFpFIpRdhQG)
To: org.eclipse.equinox.p2.core.feature.feature.group [1.0.1.dist-8291FXcFLhV8CJ871602A41]
Cannot satisfy dependency:
From: Eclipse Platform 3.7.0.I20110613-1736 (org.eclipse.platform.ide 3.7.0.I20110613-1736)
To: org.eclipse.equinox.p2.user.ui.feature.group [2.1.2.dist-6-Bk8lt6MLqLsEf6-RFpFIpRdhQG]
How to solve this and install Maven plugin?

Answer 1

Try setting the option "Contact all updates sites..." in the Installation Manger and make sure that the download site for Indigo (http://download.eclipse.org/releases/indigo) is checked.
This should be the updatesite containing your m2e Installation anyway, since the downloadsite you used contains the LATEST maven built, which is not 3.7.2 .
If you want to use a newer Eclipse, use KEpler with the updatesite http://download.eclipse.org/releases/kepler.
If that doesn't work, please post the new error.