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I got this message when I was using Update Manager:

E:Type 'ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu' 
is not known on line 2 in source list /etc/apt/sources.list.d
/otto-kesselgulasch-gimp-precise.list

How do I solve it?

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1 Answer 1

An error has somehow crept into the PPA's sources list file. Let's just delete and re-add the PPA to fix it.

  1. Open the terminal with Ctrl+Alt+T
  2. Type/paste the below,and press Enter -- enter your password if requested:
    sudo rm -f /etc/apt/sources.list.d/otto-kesselgulasch-gimp-precise.list
  3. Then type/paste:
    sudo apt-add-repository  ppa:otto-kesselgulasch/gimp -y
  4. Finally, type sudo apt-get update, wait for it to finish, and exit the Terminal.

Update Manager should now work without any errors.

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Thank u very much.... Now update session started. here is a new problem. "The action would require the installation of packages from not authenticated sources- details-libopenexr6" Pls help How can I authenticate libopenexr6. –  Santhosh Jun 26 '12 at 0:55
    
@Santhosh, please accept this answer, and create a new one with the details because this (new one) is a totally different problem :) –  izx Jun 26 '12 at 0:56
    
askubuntu.com/q/156040/73062 –  Santhosh Jun 26 '12 at 2:30

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