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I had to work with some kali packages, so i added the last kali repository to my file /etc/apt/sources.list . Everything went fine, and I installed some packages and worked with some.

But during the installation of some packages, I have noticed that some already install packages in my Ubuntu were updated to the one who are in the kali repositories. That was fine at the moment, but now when I try to install some packages for Ubuntu, I get the error Unable to correct problems , defective packets are in mode " keep state ".

I guess that he problem came from the fact that some Ubuntu packages were update the versions that were in kali repository.

So, how can I kinda unupgrade all my installed packets to the version which are in the Ubuntu repository.

PS : I have already removed kali repository. And I'm using Ubuntu 15.10 with Linux version > 4.

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  • I recommend you to backup and reinstall.
    – xangua
    Mar 4, 2016 at 16:35

2 Answers 2

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Determine the first date that you added the Kali repository, and inspect /var/log/apt/history.log for packages installed on and after that date. These are the packages that may have come from the Kali repository, and that you should reinstall.

It should be a simple matter of editing to transform this list of packages (remove the version information info, 1-entry-per-line, etc), then feed this cleaned up list of packages to sudo apt-get install --reinstall. You may have to feed the list of packages to |xargs sudo apt-get install --reinstall (see man xargs) if there are too many.

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  • I see, i looked to that log file, and the first entrance is from 2 mars. Too bad, but thanks anyway. There is noway to tell ubuntu to install versions that you find in the repositories now ??!!
    – Sidahmed
    Mar 5, 2016 at 14:29
  • Then look at /var/log/apt/history.log*. These gzipped files contain logs back to the Beginning Of Time
    – waltinator
    Mar 5, 2016 at 15:04
  • Ah, très très bien, j'ai trouvé les fichiers compressés des logs précédents, et il contient les noms des paquets que j'ai installé précédemment. Merci infiniment.
    – Sidahmed
    Mar 6, 2016 at 8:47
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I found the solution to downgrade packages to the official Ubuntu repositories : 

We have to install the package ppa-purge with sudo apt-get install ppa-purge, who will remove an external repository, and downgrade all packages to the available versions in the official repository.

So sudo ppa-purge ppa:user/ppa-name will remove the repository and automatically downgrade the packages.

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