I have been running KDE on my SL6 linux desktop for several years with 
no problems. I started with SL6.3 and it is now at 6.8.
I've just done a number of upgrades of SL5 machines. You can choose to 
install KDE when you select the desktop environment.
(All my machines are 64-bit.)
Cheers,
Eve

On Fri, 31 Mar 2017, John Pilkington wrote:

> Date: Fri, 31 Mar 2017 15:21:21 -0500
> From: John Pilkington <[log in to unmask]>
> To: Mailing list for Scientific Linux users worldwide
>     <[log in to unmask]>
> Subject: Re: Scientific Linux 5 End of Life
> 
> On 31/03/17 20:06, Larry Linder wrote:
>>  We are still using SL 5.10 on a number of workstations.  The users are
>>  used to using KDE with a lot of desktops - 12 or more.  We switched a
>>  number of boxes to SL 6.8 and we get a lot of grumbles about desktop.
>>  We run VMWare and load applications that require Windows there.  We have
>>  everything from Windows 2000 Server to Windows 10 on system.
>>
>>  Thank you All for an excellent OS.
>>  Got a number of responses but there were a lot of missing parts we could
>>  not locate.  Anybody really done it?
>>
>>  If we could only have KDE for SL 6.
>
> The screen on my SL6 32-bit laptop stopped working a few months ago and I 
> haven't felt an urgent need to get it going again - but KDE seemed fine to 
> me.
>
> http://apt.kde-redhat.org/apt/kde-redhat/sl/6/x86_64/RPMS.stable/
>
> John P
>
>>
>>  Thank You
>>  Larry Linder
>>  MicroControls LLC
>>
>>  On Fri, 2017-03-31 at 21:12 +0200, Stephan Wiesand wrote:
>> >  Time for a loud and clear "THANK YOU!" to the (present and former) team 
>> >  members for a full decade of remarkable support for SL5.
>> > 
>> >  - Stephan
>> > 
>> >  On Mar 31, 2017, at 20:27 , Pat Riehecky wrote:
>> > 
>> > >  Scientific Linux 5 has reached its End of Life.
>> > > 
>> > >  After March 31 2017 Scientific Linux 5 will not receive further 
>> > >  updates and the files will be archived.
>> > > 
>> > >  The existing files will be moved into 
>> > >  http://ftp.scientificlinux.org/linux/scientific/obsolete/ for archival 
>> > >  purposes after March 31 2017.
>> > > 
>> > >  This will break existing yum repos and kickstarts using the official 
>> > >  distribution servers.
>> > 
>> 
>
>

***************************************************************
Eve Kovacs
Argonne National Laboratory,
Room L-177, Bldg. 360, HEP
9700 S. Cass Ave.
Argonne, IL 60439 USA
Phone: (630)-252-6208
Fax:   (630)-252-5047
email: [log in to unmask]
***************************************************************