KDE Plasma 5 is hitting release candidate now: Schedules/Plasma 5 - KDE TechBase.
How can I install plasma 5 in Ubuntu 14.04.
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Since Dec, 05 2014, project neon is no more available as a PPA, unfortunately.
Utopic is shipped with Plasma 4. If you want Plasma 5 there is a KDE Next PPA (which will provide updated KDE too), but it'll replace the current installed KDE
sudo apt-add-repository ppa:kubuntu-ppa/next sudo apt update sudo apt install kubuntu-plasma5-desktop sudo apt full-upgrade
And finally, after save all your work:
I am writing answer because may some one be looking for answer in 2015 and all the answers above are outdated and won't work on ubuntu 14.04.2 trusty tahr(I have tried all). Friends. I was wondering to install kde on my ubuntu 14.04 and followed almost all online tutorials but in vain. To be frank, I run all desktop environments on my ubuntu( which are GNOME, Cinnamon, Unity, LXDE, XFCE, Compiz etc.) but I only failed in installing kde plasma desktop. So I came upon a solution and now have installed that succesfully(Hurrah!!). Just open the terminal and type below commands:
sudo add-apt-repository ppa:kubuntu-ppa/backports sudo apt-get update && sudo apt-get dist-upgrade sudo apt-get install kubuntu-desktop
And then Logout and Re login and select kde desktop. You are set. This one is updated ppa and works on ubntu 14.04 trusty. I have tried myself and it worked. You can also have a look at the ppa page at Launchpad ppa link.
Here is the way I've installed KDE Plasma 5 (I'm using Kubuntu, so below are installation instructions for the KDE GUI)
sudo /etc/init.d/apparmor stop; sudo /etc/init.d/apparmor teardown.
Current status [July 11th]:
*) This currently does work, though it may break in the middle of installation due to a file conflict with
lightdm. If you are using KDM, then you can go ahead and remove
lightdm (it will require removing
kubuntu-desktop but that is just a meta-package, you should have no problem removing it as well as any other dependency of
lightdm), after which try to complete the install. If the GUI application annoys you too much, open a konsole and run
sudo apt-get install -f to complete the setup. Alternatively, if you prefer
lightdm as you session manager, then after the installation fails, just remove
project-neon5-sddm and its dependencies (which would just be the
project-neon5-live-session meta package).
I haven't tested it, but the Neon Project offers a Ubuntu PPA with the betas and RC packages.
Here's the unstable packages, You will find tomorrow Kde unstable mirror .