The availability of the KDE Plasma, Applications and Platform 4.9.3 for the Kubuntu has been released on the http://www.kubuntu.org/.
By the http://www.kubuntu.org/news/kde-sc-4.9.3:
Packages for the release of KDE SC 4.9.3 are available for Kubuntu
12.04, 12.10 and Raring. You can get them from the Kubuntu Backports PPA for 12.04...
A simulation of the Gwenview upgrade (gwenview 4:4.8.5-0ubuntu0.1 -> 4:4.9.3-0ubuntu1~ubuntu12.04.1~ppa2) :
sudo apt-get install -s gwenview
The following extra packages will be installed:
kdelibs-bin kdelibs5-data kdelibs5-dev kdelibs5-plugins kdoctools libattica0.4 libkcmutils4 libkde3support4
libkdeclarative5 libkdecore5 libkdesu5 libkdeui5 libkdewebkit5 libkdnssd4 libkemoticons4 libkfile4 libkhtml5
libkidletime4 libkimproxy4 libkio5 libkipi-data libkipi9 libkjsapi4 libkjsembed4 libkmediaplayer4 libknewstuff2-4
libknewstuff3-4 libknotifyconfig4 libkntlm4 libkparts4 libkprintutils4 libkpty4 libkrosscore4 libkrossui4
libktexteditor4 libkunitconversion4 libkutils4 libnepomuk4 libnepomukquery4a libnepomukutils4 libplasma3 libsolid4
libsoprano-dev libsoprano4 libthreadweaver4 soprano-daemon
Suggested packages:
svgpart hspell media-player-info libsoprano-doc
The following packages will be REMOVED:
kdelibs5-experimental-dev
The following NEW packages will be installed:
libattica0.4 libkipi9
The following packages will be upgraded:
gwenview kdelibs-bin kdelibs5-data kdelibs5-dev kdelibs5-plugins kdoctools libkcmutils4 libkde3support4
libkdeclarative5 libkdecore5 libkdesu5 libkdeui5 libkdewebkit5 libkdnssd4 libkemoticons4 libkfile4 libkhtml5
libkidletime4 libkimproxy4 libkio5 libkipi-data libkjsapi4 libkjsembed4 libkmediaplayer4 libknewstuff2-4
libknewstuff3-4 libknotifyconfig4 libkntlm4 libkparts4 libkprintutils4 libkpty4 libkrosscore4 libkrossui4
libktexteditor4 libkunitconversion4 libkutils4 libnepomuk4 libnepomukquery4a libnepomukutils4 libplasma3 libsolid4
libsoprano-dev libsoprano4 libthreadweaver4 soprano-daemon
45 upgraded, 2 newly installed, 1 to remove and 289 not upgraded.
Apt-get manual
man apt-get
install
install is followed by one or more packages desired for installation or upgrading...
-s, --simulate, --just-print, --dry-run, --recon, --no-act
No action; perform a simulation of events that would occur but do not actually change the system...
/homepartition so I just easily reinstall Kubuntu every half a month... – BlaXpirit Nov 18 '12 at 9:30