I am following this guide trying to turn my Ubuntu-desktop-installation into Ubuntu-server.

However, I am having problems already in step 2. Using tasksel to remove/install anything returns with:

tasksel: aptitude failed (100)

I've Googled around and read this question (it was the first thing I tried), but nothing suggested works.

I am running 12.04.

Afraid I do now have much more information than that. If anyone could point me in the direction of an error-log that I could look into I can supply with further info, but I have not found anything of interest in them yet.

  • Was there any other error output, or was it just that error? It may have failed if you have not done sudo apt-get update by hand, or if aptitude is not installed – Thomas Ward Nov 28 '13 at 20:33
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    @ThomasW. I've done apt-get update and it works like it should. Also installing anything using apt-get works. When using tasksel only that error is returned. I see the "pink"-view with the download-bar for a few seconds before it jumps out again. No idea what's wrong. – Thomas Gautvedt Nov 28 '13 at 20:57
  • There's no way to diagnose this issue, then, unless tasksel has a log that its keeping somewhere. – Thomas Ward Nov 28 '13 at 21:06
  • I have exactly the same issue on 14.04 – Poma Aug 29 '15 at 8:43

I had exactly the same issue on 14.04 and managed to solve it. The reason was some broken dependencies. In my case it was Java package so I removed it and then reinstalled after running tasksel.

A one way to find broken dependency is to try to run apt-get remove ubuntu-desktop^ and see whether it will complain about unsatisfied dependencies or just list packages to remove. Make sure to select No and don't actually remove any packages with this command. It may ruin your system


I am running 14.04. I've got this error, then I installed default-jre and then I could remove ubuntu-desktop by tasksel.

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