Unless my memory is totally failing me, or I've managed to inadvertently install a program, there should be no third party repositories. Of course, I have only a vague notion of what third party repositories are. The output for 'sudo apt-get upgrade' follows: Reading package lists... Done Building dependency tree Reading state information... Done The following packages have been kept back: aisleriot alsa-utils apparmor apport apport-gtk apt apt-transport-https apt-utils apt-xapian-index aptdaemon aptitude apturl apturl-common aspell avahi-daemon base-files bash bash-completion bind9-host binutils bluez bluez-alsa bluez-cups bluez-gstreamer brasero brasero-common brltty bsdmainutils bzip2 ca-certificates checkbox command-not-found compiz compiz-core compiz-gnome compizconfig-backend-gconf console-setup consolekit coreutils cpp cron cups cups-bsd cups-client dbus-x11 debianutils desktop-file-utils dictionaries-common dnsmasq-base dnsutils doc-base dpkg dvd+rw-tools e2fslibs e2fsprogs empathy empathy-common eog espeak espeak-data evince evolution-data-server evolution-data-server-common file-roller fontconfig-config foomatic-db-engine friendly-recovery fuse-utils gcalctool gcc gconf2 gconf2-common gdb gedit gedit-common ghostscript ghostscript-x gnome-bluetooth gnome-control-center gnome-disk-utility gnome-icon-theme gnome-keyring gnome-media gnome-menus gnome-nettool gnome-orca gnome-power-manager gnome-screensaver gnome-session gnome-session-bin gnome-session-canberra gnome-settings-daemon gnome-sudoku gnome-system-monitor gnome-terminal gnome-terminal-data gnome-user-guide gnome-user-share gnomine grub-common grub-pc gstreamer0.10-alsa gstreamer0.10-nice gstreamer0.10-plugins-base gstreamer0.10-plugins-base-apps gstreamer0.10-plugins-good gstreamer0.10-pulseaudio gstreamer0.10-tools gstreamer0.10-x gtk2-engines gtk2-engines-murrine gucharmap guile-1.8-libs gvfs gvfs-backends gvfs-bin gvfs-fuse gwibber gwibber-service hplip hplip-data ibus ibus-gtk ibus-table ifupdown indicator-application indicator-messages indicator-session indicator-sound info initscripts intel-gpu-tools iproute iptables iputils-ping jockey-common jockey-gtk kbd language-selector-common launchpad-integration libaa1 libacl1 libasound2 libasound2-plugins libaspell15 libatasmart4 libatk1.0-0 libatm1 libattr1 libaudio2 libavahi-client3 libavahi-common3 libavahi-glib1 libavahi-gobject0 libavc1394-0 libblkid1 libbluetooth3 libbonobo2-0 libbonobo2-common libbsd0 libbz2-1.0 libc-bin libc-dev-bin libc6 libc6-dev libcaca0 libcairo-perl libcairo2 libcairomm-1.0-1 libcanberra-gtk-module libcanberra-gtk0 libcanberra-pulse libcanberra0 libcap2 libcdparanoia0 libcomerr2 libcompizconfig0 libcroco3 libcups2 libcupscgi1 libcupsdriver1 libcupsimage2 libcupsmime1 libcupsppdc1 libcurl3 libcurl3-gnutls libcwidget3 libdatrie1 libdbus-1-3 libdbus-glib-1-2 libdbusmenu-qt2 libdjvulibre21 libdrm-intel1 libdrm-radeon1 libdrm2 libdv4 libedit2 libelf1 libenchant1c2a libespeak1 libexempi3 libexif12 libexpat1 libflac8 libfontconfig1 libfreetype6 libfuse2 libgail-common libgail18 libgcc1 libgconf2-4 libgcrypt11 libgd2-xpm libgdbm3 libgdu-gtk0 libgdu0 libgksu2-0 libgl1-mesa-dri libgl1-mesa-glx libglade2-0 libglib-perl libglib2.0-0 libglibmm-2.4-1c2a libglu1-mesa libgnome-keyring0 libgnome2-0 libgnome2-common libgnomekbd-common libgnomevfs2-0 libgnomevfs2-common libgnutls26 libgomp1 libgpg-error0 libgpgme11 libgphoto2-2 libgphoto2-port0 libgpm2 libgpod-common libgpod4 libgssapi-krb5-2 libgstreamer-plugins-base0.10-0 libgstreamer0.10-0 libgtk2-perl libgtk2.0-0 libgtk2.0-bin libgtk2.0-common libgudev-1.0-0 libgutenprint2 libgweather-common libhpmud0 libice6 libidl0 libidn11 libiec61883-0 libieee1284-3 libjasper1 libjson-glib-1.0-0 libk5crypto3 libkeyutils1 libkrb5-3 libkrb5support0 liblaunchpad-integration1 liblcms1 libldap-2.4-2 liblocale-gettext-perl liblockfile1 libltdl7 liblua5.1-0 liblzo2-2 libmetacity-private0 libmng1 libncurses5 libncursesw5 libneon27-gnutls libnewt0.52 libnih-dbus1 libnih1 libogg0 liborbit2 liborc-0.4-0 libpam-modules libpam0g libpango-perl libpango1.0-0 libpangomm-1.4-1 libparted0debian1 libpcap0.8 libpci3 libpciaccess0 libpcre3 libpcsclite1 libpixman-1-0 libplymouth2 libpng12-0 libpolkit-agent-1-0 libpolkit-backend-1-0 libpolkit-gobject-1-0 libpopt0 libportaudio2 libpulse-mainloop-glib0 libpulse0 libpurple0 libqt4-dbus libqt4-network libqt4-opengl libqt4-script libqt4-sql libqt4-svg libqt4-xml libqt4-xmlpatterns libqtcore4 libqtgui4 libraw1394-11 librdf0 libreadline6 librsvg2-2 librsvg2-common libsamplerate0 libsane libsasl2-2 libsasl2-modules libsdl1.2debian libselinux1 libsensors4 libshout3 libsigc++-2.0-0c2a libslang2 libsm6 libsmbclient libsndfile1 libsnmp15 libsoup-gnome2.4-1 libsoup2.4-1 libspectre1 libspeex1 libspeexdsp1 libsqlite3-0 libss2 libssh-4 libstartup-notification0 libstdc++6 libsub-name-perl libtag1-vanilla libtag1c2a libtalloc2 libtasn1-3 libtdb1 libtelepathy-glib0 libtext-charwidth-perl libtext-iconv-perl libthai0 libtheora0 libtiff4 libtotem-plparser17 libudev0 libusb-0.1-4 libusb-1.0-0 libuuid-perl libuuid1 libv4l-0 libvisual-0.4-0 libvisual-0.4-plugins libvorbis0a libvorbisenc2 libvorbisfile3 libwavpack1 libwbclient0 libwmf0.2-7 libwmf0.2-7-gtk libwnck22 libwrap0 libx11-6 libx11-data libxau6 libxaw7 libxcb-render0 libxcb-shape0 libxcb-shm0 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxdmcp6 libxext6 libxfixes3 libxft2 libxi6 libxinerama1 libxkbfile1 libxml2 libxmu6 libxmuu1 libxp6 libxpm4 libxrandr2 libxrender1 libxslt1.1 libxt6 libxtst6 libxv1 libxxf86vm1 light-themes logrotate lsb-release man-db metacity metacity-common modemmanager module-init-tools mount mountall mousetweaks nano nautilus nautilus-data nautilus-sendto nautilus-sendto-empathy nautilus-share ncurses-bin network-manager network-manager-gnome network-manager-pptp network-manager-pptp-gnome notify-osd ntfs-3g ntpdate nvidia-common obex-data-server obexd-client onboard openprinting-ppds openssh-client openssl parted passwd pciutils pcmciautils perl perl-base perl-modules pkg-config plymouth plymouth-label policykit-1 policykit-1-gnome poppler-utils ppp procps protobuf-compiler psmisc pulseaudio pulseaudio-esound-compat pulseaudio-module-bluetooth pulseaudio-module-gconf pulseaudio-module-x11 pulseaudio-utils python python-appindicator python-apport python-apt python-aptdaemon python-brlapi python-cairo python-configglue python-crypto python-cups python-cupshelpers python-dbus python-debian python-egenix-mxdatetime python-egenix-mxtools python-gconf python-gdbm python-glade2 python-gnomekeyring python-gnupginterface python-gobject python-gst0.10 python-gtk2 python-httplib2 python-ibus python-imaging python-launchpadlib python-lazr.restfulclient python-lazr.uri python-libxml2 python-louis python-mako python-minimal python-notify python-oauth python-openssl python-packagekit python-pam python-pexpect python-problem-report python-protobuf python-pycurl python-pyinotify python-serial python-simplejson python-smbc python-software-properties python-speechd python-twisted-bin python-twisted-core python-twisted-names python-twisted-web python-ubuntuone-client python-ubuntuone-storageprotocol python-uno python-virtkey python-wadllib python-xapian python-xdg python-xkit python-zope.interface rsync rsyslog samba-common samba-common-bin seahorse simple-scan smbclient software-center software-properties-gtk speech-dispatcher sudo syslinux system-config-printer-common system-config-printer-udev sysvinit-utils tcpdump telepathy-gabble telepathy-haze telepathy-idle telepathy-mission-control-5 telepathy-salut toshset totem-common transmission-common transmission-gtk ttf-thai-tlwg tzdata ubuntu-desktop ubuntu-docs ubuntu-minimal ubuntu-system-service ubuntu-wallpapers ubuntuone-client ubuntuone-client-gnome udev udisks ufw uno-libs3 update-manager update-manager-core update-notifier update-notifier-common upower upstart ure ureadahead usb-creator-common usb-creator-gtk usbmuxd usbutils util-linux uuid-runtime vbetool vim-common vim-tiny vino wget whiptail whois wireless-tools wpasupplicant x11-utils xdg-user-dirs-gtk xkb-data xorg xserver-xorg xserver-xorg-core xserver-xorg-input-evdev xserver-xorg-input-mouse xserver-xorg-input-synaptics xserver-xorg-input-vmmouse xserver-xorg-input-wacom xserver-xorg-video-all xserver-xorg-video-ati xserver-xorg-video-cirrus xserver-xorg-video-fbdev xserver-xorg-video-geode xserver-xorg-video-intel xserver-xorg-video-mach64 xserver-xorg-video-mga xserver-xorg-video-neomagic xserver-xorg-video-nouveau xserver-xorg-video-openchrome xserver-xorg-video-r128 xserver-xorg-video-radeon xserver-xorg-video-s3 xserver-xorg-video-savage xserver-xorg-video-siliconmotion xserver-xorg-video-sis xserver-xorg-video-sisusb xserver-xorg-video-tdfx xserver-xorg-video-trident xserver-xorg-video-vesa xserver-xorg-video-vmware xterm xz-utils yelp zenity zlib1g The following packages will be upgraded: acpi-support acpid adduser adium-theme-ubuntu adobe-flash-properties-gtk adobe-flash-properties-kde adobe-flashplugin alsa-base anacron app-install-data app-install-data-partner apport-symptoms aspell-en at avahi-autoipd avahi-utils base-passwd bogofilter bogofilter-bdb bogofilter-common branding-ubuntu bsdutils busybox-initramfs busybox-static command-not-found-data cpio cups-common dash dbus debconf debconf-i18n diffutils dmidecode dmsetup dmz-cursor-theme dosfstools ed eject example-content file findutils firefox firefox-3.5 firefox-3.5-branding firefox-3.5-gnome-support firefox-branding firefox-gnome-support firefox-locale-en fontconfig foomatic-filters ftp genisoimage geoip-database gettext-base ghostscript-cups gksu gnome-accessibility-themes gnupg gnupg-curl gpgv grep groff-base gsfonts gzip hdparm hicolor-icon-theme hostname human-theme humanity-icon-theme hunspell-en-us im-switch initramfs-tools initramfs-tools-bin inputattach insserv install-info iputils-arping iputils-tracepath irqbalance iso-codes kerneloops-daemon klibc-utils language-pack-en language-pack-en-base language-pack-gnome-en language-pack-gnome-en-base less libart-2.0-2 libatk1.0-data libavahi-common-data libavcodec-extra-52 libavformat52 libavutil-extra-49 libbrlapi0.5 libcap-ng0 libck-connector0 libdecoration0 libdevmapper1.02.1 libdjvulibre-text libfontenc1 libfs6 libgdata-common libgeoip1 libglib2.0-data libgnome-menu2 libgtop2-7 libgtop2-common libhyphen0 libical0 libijs-0.35 libiw30 libjs-jquery libklibc libkpathsea5 liblircclient0 liblouis-data libmagic1 libmeanwhile1 libnspr4-0d libnss-mdns libnss3-1d libpam-ck-connector libpam-gnome-keyring libpam-runtime libpaper-utils libpaper1 libparse-debianchangelog-perl libplist1 libpostproc51 libpq5 libpth20 libpurple-bin libsgutils2-2 libslp1 libsnmp-base libspeechd2 libswscale0 libsysfs2 libthai-data libtimedate-perl libupower-glib1 libusbmuxd1 libwnck-common libx86-1 libxfont1 libxklavier16 libxres1 libxvmc1 libxxf86dga1 libzephyr4 linux-firmware linux-headers-2.6.32-45 linux-headers-2.6.32-45-generic linux-image-2.6.32-45-generic linux-libc-dev linux-sound-base locales lockfile-progs login lsb-base lshw ltrace make makedev manpages manpages-dev mawk media-player-info memtest86+ mime-support mlocate mobile-broadband-provider-info mscompress mtools mtr-tiny ncurses-base net-tools netbase netcat-openbsd notify-osd-icons openoffice.org-hyphenation opera os-prober patch plymouth-theme-ubuntu-logo plymouth-theme-ubuntu-text pm-utils policykit-desktop-privileges popularity-contest pppconfig pppoeconf pptp-linux python-pkg-resources radeontool readline-common rtkit sane-utils sed sensible-utils sgml-base shared-mime-info ssh-askpass-gnome ssl-cert strace system-config-printer-gnome sysv-rc tar tasksel tasksel-data tcpd time ttf-dejavu-core ttf-freefont ttf-indic-fonts-core ttf-punjabi-fonts ttf-wqy-microhei ubuntu-artwork ubuntu-keyring ubuntu-mono ubuntu-sounds ubuntu-standard ucf unattended-upgrades unzip update-inetd wamerican wodim x11-apps x11-common x11-session-utils x11-xfs-utils x11-xkb-utils x11-xserver-utils xauth xbitmaps xcursor-themes xdg-user-dirs xdg-utils xfonts-base xfonts-encodings xfonts-scalable xfonts-utils xinit xinput xorg-docs-core xserver-common xserver-xorg-input-all zip 248 upgraded, 0 newly installed, 0 to remove and 616 not upgraded. Need to get 85.9MB/188MB of archives. After this operation, 68.1MB disk space will be freed. Do you want to continue [Y/n]? What follows is the output after opting to continue: Do you want to continue [Y/n]? y WARNING: The following packages cannot be authenticated! libavutil-extra-49 libavcodec-extra-52 Install these packages without verification [y/N]? Since I have no idea what these packages are about, I opted to not install them. Hope this helps. On Sun, Jan 20, 2013 at 12:24 AM, sampo555