When upgrading from ubuntu 12.04 to 14.04..system installs upgrades and hangs at one or the other place....have tried it three times....here are the issues i face

  1. update installation fails at one or the other place
  2. there after system does not start and i have to go back to factory settings (12.04)
  3. cannot try this process repeatedly as first i have to upgrade 12.04 to latest then download 1900+ files for 14.04 and then installation starts which fails
  4. entire cycle takes 3-4 hours...
  5. have tried one suggested command to un-install cinnamon....did not work

plz suggest steps with complete instructions to upgrade from 12.04 to 14.04 (new to Linux)

or suggest a full proof process to move to 14.04 - format and direct installation tof 14.04 (if it is a sure shot process)

It stuck during installing upgrade at "Preparing fonts-khmeros-core" at terminal last line i see is "preparing to unpack..../fonts - lao_0.0.20060226-9_all.deb....."

Software index is broken - it is impossible to install or remove any software

  • 1
    Any error messages to show us? – Kaspar Oct 26 '14 at 17:14
  • Kaspar, plz find additional details added – Rishi Thapliyal Oct 27 '14 at 16:46

Try to remove all the PPA's from your PPA list. Then do a sudo apt-get update && sudo apt-get upgrade

  • Thanks Kaspar. How to remove all PPAs? Plz write the command – Rishi Thapliyal Oct 28 '14 at 17:15
  • Open your dash and type software, then open the Software & Updates from there. Now open the Other software tab and from the click on PPA's that do not contain your Ubuntu distribution name, and click on the remove button. – Kaspar Oct 29 '14 at 10:23

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