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Oke now i really messed up my system. I have tried to uninstall gnome 3. I have followed this guide.

But now my system do not anything at all. When I boot it stops when it needs to load the GUI. I thought keep calm there must be an easy solution for this. I opened a tty and did this commands:

sudo apt-get install dist-upgrade 
sudo apt-get install gnome-panel //get errors about dm :/
sudo apt-get install gnome-shell //same
sudo apt-get install ubuntu-desktop //get message that distibution is unstable
sudo apt-get install unity
start lightdm // Don't work :(

Is there any way I can recover my system?

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try # apt-get purge gnome-shell –  Marco Scannadinari Apr 3 '13 at 20:26
    
Don't work: error gnome-shell not installed. –  Thomas15v Apr 4 '13 at 7:02
1  
"sudo dpkg-reconfigure -phigh -a" I have founded this command. Can I run it safe without loosing my data. –  Thomas15v Apr 4 '13 at 8:05
    
Yes, that command will not break your system in theory. That will reconfigure every package in your OS, so it will take a long time 1-2 hours. It means: dpkg - Debian's package manager, -reconfigure - reconfigure, -p - Priority of configuration - high - A high priority, and -a - configure all packages. –  Marco Scannadinari Apr 4 '13 at 10:12
    
Failed to, I just reinstalled ubuntu again. :( alle my configuration gone :'(. –  Thomas15v Apr 4 '13 at 10:37
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up vote -1 down vote accepted

In this case i would say just reinstall ubuntu.

  1. Boot using live CD
  2. Open terminal and do sudo nautilus
  3. Copy your Home directory to an external device
  4. Remove your ubuntu parions using gparted
  5. Start installation
  6. Copy over your files / or just the files you need ;).
  7. Start configurate your system again (Have fun with that).
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