alan@cads:~$ sudo add-apt-repository ppa:neon/kf5
Cannot add PPA: 'ppa:neon/kf5'.
Please check that the PPA name or format is correct.
alan@cads:~$ sudo add-apt-repository ppa:neon
FOR LOVE OF BLUE GEARS! PACKAGES HERE ARE UNSTABLE, USE AT YOUR OWN RISK
More info:
https://launchpad.net/~neon/+archive/ubuntu/ppa
Press [ENTER] to continue or ctrl-c to cancel adding it
gpg: keyring `/tmp/tmp4ltwhacy/secring.gpg' created
gpg: keyring `/tmp/tmp4ltwhacy/pubring.gpg' created
gpg: requesting key DA96D7C5 from hkp server keyserver.ubuntu.com
gpg: /tmp/tmp4ltwhacy/trustdb.gpg: trustdb created
gpg: key DA96D7C5: public key "Launchpad Project Neon" imported
gpg: Total number processed: 1
gpg: imported: 1 (RSA: 1)
OK
alan@cads:~$ sudo apt-get install project-neon5-session project-neon5-utils project-neon5-konsole project- neon5-breeze project-neon5-plasma-workspace-wallpapers
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package project-neon5-session
E: Unable to locate package project-neon5-utils
E: Unable to locate package project-neon5-konsole
E: Unable to locate package project
E: Unable to locate package neon5-breeze
E: Unable to locate package project-neon5-plasma-workspace-wallpapers
alan@cads:~$ sudo aptitude search project-neon5
p pkg-project-neon5-tools - packaging tools for Project Neon
p project-neon5-apport - Apport configuration for Project Neon
p project-neon5-common - Runtime files for Project Neon
p project-neon5-common:i386 - Runtime files for Project Neon
p project-neon5-session - Xsession configuration for Project Neon
p project-neon5-utils - Utility scripts for Project Neon
alan@cads:~$ sudo apt-get install project-neon5-session project-neon5-utils project-neon5-common project-neon5-apport
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies:
project-neon5-session : Depends: project-neon5-plasma-framework but it is not installable
Depends: project-neon5-kde-workspace but it is not installable
Depends: project-neon5-kde-runtime but it is not installable
E: Unable to correct problems, you have held broken packages.
alan@cads:~$ sudo apt-add-repository ppa:kubuntu-ppa/next;sudo apt update;sudo apt install kubuntu-plasma5-desktop;sudo apt full-upgrade
E: Unable to locate package kubuntu-plasma5-desktop
alan@cads:~$ cat /proc/version
Linux version 3.13.0-52-lowlatency (buildd@comet) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #86-Ubuntu SMP PREEMPT Mon May 4 04:50:10 UTC 2015 Ubuntu Studio 14.04