Ubuntu reinstall process

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##Ubuntu Reinstall progres

1. Install / and /home apart, so it's easier to make a reinstall

2. Backup all packages!

2.1. Create a REINSTALL directory in your Home. The type in Terminal in the directory:
sudo apt-get update
dpkg --get-selections > /REINSTALL/installed-programs.log
2.2. Save you GPG keys
sudo apt-key exportall > ~/REINSTALL/repositories.key
2.3 Save your Sources List. Type in Terminal
sudo nautilus
In the open window move "/etc/apt/sources.list" and "/etc/apt/sources.list.d/" to the /REINSTALL/ folder
2.4 Save your APT packages. Type in Terminal
sudo nautilus
In the open window move "/var/cache/apt" to the /REINSTALL/ folder. Omit the .lock file

3. Get it back

3.1. In Terminal type:
sudo nautilus
Move your sources and apt cache folders and files back to their place

3.2. Get you GPG keys back type in terminal
sudo apt-key add ~/REINSTALL/repositories.key&&sudo apt-get update

3.3. Open Terminal once reinstalled and type
cd REINSTALL
sudo dpkg --set-selections < installed-programs.log
sudo apt-get dselect-upgrade

Or:
Eliminate the "install" word from installed-programs.log
then type in the Terminal (on the installed-programs directory):
cat installed-programs.log | xargs sudo apt-get install -y

aaaand You're back!

Tested on Ubuntu 12.10