How to remove Kubuntu and Xubuntu from Ubuntu

Remove Kubuntu:

sudo apt-get remove adept akregator amarok amarok-common amarok-engine-xine apport-qt ark dolphin dragonplayer exiv2 foomatic-db-gutenprint gdebi-kde gnupg-agent gtk-qt-engine guidance-power-manager gwenview hpijs-ppds hplip-gui ijsgutenprint imagemagick install-package jockey-kde k3b k3b-data kaddressbook kamera kate kde-icons-oxygen kde-printer-applet kde-window-manager kde-zeroconf kdebase-bin kdebase-data kdebase-plasma kdebase-runtime kdebase-runtime-bin-kde4 kdebase-runtime-data kdebase-runtime-data-common kdebase-workspace-bin kdebase-workspace-data kdebase-workspace-libs4+5 kdebluetooth kdegraphics-strigi-plugins kdelibs-bin kdelibs-data kdelibs4c2a kdelibs5 kdelibs5-data kdemultimedia-kio-plugins kdepasswd kdepim-kresources kdepim-strigi-plugins kdepim-wizards kdepimlibs-data kdepimlibs5 kdeplasma-addons kdeplasma-addons-data kdeplasma-addons-libs4 kdesudo kdm kfind kgrubeditor khelpcenter4 klipper kmag kmail kmix kmousetool knotes konqueror konqueror-nsplugins konqueror-plugin-searchbar konsole kontact konversation kopete korganizer krdc krfb ksnapshot ksysguard ksysguardd ksystemlog ktimetracker ktorrent kubuntu-artwork-usplash kubuntu-default-settings kubuntu-desktop kubuntu-docs kubuntu-konqueror-shortcuts kuser kvkbd kwalletmanager language-selector-qt libakonadiprivate1 libarts1c2a libartsc0 libaudio2 libavahi-qt3-1 libcapseo0 libcaptury0 libclucene0ldbl libdbus-1-qt3 libdbus-qt-1-1c2 libexiv2-4 libfftw3-3 libflac++6 libgeoip1 libifp4 libk3b3 libkcddb4 libkdecorations4 libkdepim4 libkholidays4 libkipi-common libkipi5 libkleo4 libkonq5 libkonq5-templates libkpgp4 libksieve4 libkwineffects1 liblua50 liblualib50 libmimelib4 libmodplug0c2 libmpcdec3 libmysqlclient15off libnjb5 libofa0 libokularcore1 libphonon4 libplasma2 libpoppler-qt4-3 libpq5 libqca2 libqca2-plugin-ossl libqimageblitz4 libqt3-mt libqt4-assistant libqt4-core libqt4-dbus libqt4-designer libqt4-help libqt4-network libqt4-opengl libqt4-qt3support libqt4-script libqt4-sql libqt4-sql-mysql libqt4-svg libqt4-test libqt4-webkit libqt4-xml libqt4-xmlpatterns libqtcore4 libqtgui4 libraptor1 librasqal0 librdf0 libruby1.8 libsearchclient0 libsoprano4 libstreamanalyzer0 libstreams0 libstrigihtmlgui0 libstrigiqtdbusclient0 libtunepimp5 libvncserver0 libxcb-shape0 libxcb-shm0 libxcb-xv0 libxine1 libxine1-bin libxine1-console libxine1-misc-plugins libxine1-x libxvmc1 libzip1 mediamanager mysql-common network-manager-kde okular okular-extra-backends openoffice.org-kde openoffice.org-style-crystal oxygen-cursor-theme phonon phonon-backend-gstreamer phonon-backend-xine pinentry-gtk2 pinentry-qt4 plasmoid-quickaccess python-kde4 python-qt3 python-qt4 python-qt4-common python-qt4-dbus python-reportlab python-sip4 qt4-qtconfig raptor-utils redland-utils ruby ruby1.8 software-properties-kde soprano-daemon speedcrunch strigi-client strigi-daemon system-config-printer-kde systemsettings ttf-dustin update-manager-kde update-notifier-kde && sudo apt-get install ubuntu-desktop

Remove Kubuntu KDE 4

sudo apt-get remove adept akregator amarok amarok-common amarok-engine-xine apport-qt ark dolphin dragonplayer exiv2 foomatic-db-gutenprint gdebi-kde gnupg-agent gtk-qt-engine guidance-power-manager gwenview hpijs-ppds hplip-gui ijsgutenprint imagemagick install-package jockey-kde k3b k3b-data kaddressbook kamera kate kde-icons-oxygen kde-printer-applet kde-window-manager kde-zeroconf kdebase-bin kdebase-data kdebase-plasma kdebase-runtime kdebase-runtime-bin-kde4 kdebase-runtime-data kdebase-runtime-data-common kdebase-workspace-bin kdebase-workspace-data kdebase-workspace-libs4+5 kdebluetooth kdegraphics-strigi-plugins kdelibs-bin kdelibs-data kdelibs4c2a kdelibs5 kdelibs5-data kdemultimedia-kio-plugins kdepasswd kdepim-kresources kdepim-strigi-plugins kdepim-wizards kdepimlibs-data kdepimlibs5 kdeplasma-addons kdeplasma-addons-data kdeplasma-addons-libs4 kdesudo kdm kfind kgrubeditor khelpcenter4 klipper kmag kmail kmix kmousetool knotes konqueror konqueror-nsplugins konqueror-plugin-searchbar konsole kontact konversation kopete korganizer krdc krfb ksnapshot ksysguard ksysguardd ksystemlog ktimetracker ktorrent kubuntu-artwork-usplash kubuntu-default-settings kubuntu-desktop kubuntu-docs kubuntu-konqueror-shortcuts kuser kvkbd kwalletmanager language-selector-qt libakonadiprivate1 libarts1c2a libartsc0 libaudio2 libavahi-qt3-1 libcapseo0 libcaptury0 libclucene0ldbl libdbus-1-qt3 libdbus-qt-1-1c2 libexiv2-4 libfftw3-3 libflac++6 libgeoip1 libifp4 libk3b3 libkcddb4 libkdecorations4 libkdepim4 libkholidays4 libkipi-common libkipi5 libkleo4 libkonq5 libkonq5-templates libkpgp4 libksieve4 libkwineffects1 liblua50 liblualib50 libmimelib4 libmodplug0c2 libmpcdec3 libmysqlclient15off libnjb5 libofa0 libokularcore1 libphonon4 libplasma2 libpoppler-qt4-3 libpq5 libqca2 libqca2-plugin-ossl libqimageblitz4 libqt3-mt libqt4-assistant libqt4-core libqt4-dbus libqt4-designer libqt4-help libqt4-network libqt4-opengl libqt4-qt3support libqt4-script libqt4-sql libqt4-sql-mysql libqt4-svg libqt4-test libqt4-webkit libqt4-xml libqt4-xmlpatterns libqtcore4 libqtgui4 libraptor1 librasqal0 librdf0 libruby1.8 libsearchclient0 libsoprano4 libstreamanalyzer0 libstreams0 libstrigihtmlgui0 libstrigiqtdbusclient0 libtunepimp5 libvncserver0 libxcb-shape0 libxcb-shm0 libxcb-xv0 libxine1 libxine1-bin libxine1-console libxine1-misc-plugins libxine1-x libxvmc1 libzip1 mediamanager mysql-common network-manager-kde okular okular-extra-backends openoffice.org-kde openoffice.org-style-crystal oxygen-cursor-theme phonon phonon-backend-gstreamer phonon-backend-xine pinentry-gtk2 pinentry-qt4 plasmoid-quickaccess python-kde4 python-qt3 python-qt4 python-qt4-common python-qt4-dbus python-reportlab python-sip4 qt4-qtconfig raptor-utils redland-utils ruby ruby1.8 software-properties-kde soprano-daemon speedcrunch strigi-client strigi-daemon system-config-printer-kde systemsettings ttf-dustin update-manager-kde update-notifier-kde

Remove Xubuntu

sudo apt-get remove a2ps abiword abiword-common abiword-help abiword-plugin-grammar abiword-plugin-mathview abiword-plugins aumix catfish cupsys-driver-gutenprint exo-utils gnumeric gnumeric-common gnumeric-gtk gpicview gtk2-engines-xfce imagemagick latex-xft-fonts libaiksaurus-1.2-0c2a libaiksaurus-1.2-data libaiksaurusgtk-1.2-0c2a libdiscid0 libexo-0.3-0 libfftw3-3 libgda3-3 libgda3-bin libgda3-common libgdl-1-0 libgdl-1-common libgdome2-0 libgdome2-cpp-smart0c2a libgoffice-0-6 libgoffice-0-6-common libgoffice-gtk-0-6 libgsf-gnome-1-114 libgtkmathview0c2a liblink-grammar4 libloudmouth1-0 libmad0 libmpcdec3 libnotify-bin libofa0 libots0 libt1-5 libtagc0 libthunar-vfs-1-2 libtunepimp5 libxfce4mcs-client3 libxfce4mcs-manager3 libxfce4util4 libxfcegui4-4 link-grammar-dictionaries-en listen mousepad mozilla-thunderbird orage psutils python-ctypes python-gnome2-extras python-musicbrainz2 python-mutagen python-ogg python-pymad python-pyogg python-pysqlite2 python-pyvorbis python-tunepimp scim-modules-table scim-tables-additional slocate tango-icon-theme tango-icon-theme-common tcl8.4 thunar thunar-archive-plugin thunar-data thunar-media-tags-plugin thunar-thumbnailers thunar-volman thunderbird vim-runtime wdiff xchat xchat-common xfce4-appfinder xfce4-battery-plugin xfce4-clipman-plugin xfce4-cpugraph-plugin xfce4-dict xfce4-fsguard-plugin xfce4-governor-plugin xfce4-icon-theme xfce4-mailwatch-plugin xfce4-mcs-manager xfce4-mcs-plugins xfce4-mcs-plugins-extra xfce4-mixer xfce4-mixer-alsa xfce4-mount-plugin xfce4-netload-plugin xfce4-notes-plugin xfce4-panel xfce4-places-plugin xfce4-quicklauncher-plugin xfce4-screenshooter-plugin xfce4-session xfce4-smartbookmark-plugin xfce4-systemload-plugin xfce4-terminal xfce4-utils xfce4-verve-plugin xfce4-weather-plugin xfce4-xkb-plugin xfdesktop4 xfdesktop4-data xfprint4 xfwm4 xfwm4-themes xubuntu-artwork-usplash xubuntu-default-settings xubuntu-desktop xubuntu-docs && sudo apt-get install ubuntu-desktop


When you are asked whether to stop KDM, choose NO. Otherwise, you will jump into terminal enviroment.