I wanted to remove and reinstall python2.7 interpreter on 12.04
But when I did
sudo apt-get remove python2.7, The crazy terminal started to remove everything!!! Any idea how I can restore whatever I've removed?
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While reinstalling Ubuntu is probably the easiest way, it's worth pointing out that it's possible to recover without reinstalling everything.
To do this, manually download the
python2.7 package (and its dependencies), and manually install them using
dpkg (bypassing APT, which requires Python). Once that's installed,
apt should work again, and so
apt-get install ubuntu-desktop will restore your system. (If
apt-get still doesn't work, you might also need to download and install any missing dependencies.)
In the future, if you need to reinstall a package, instead use
sudo apt-get install --reinstall python2.7
sudo aptitude reinstall python2.7
which reinstalls the package without having to remove the dependencies.
Removing Python is not a good idea as much of Ubuntu depends on it. You may have seen a warning telling you which packages depend on python and thus will be removed with Python. When proceeding you end up with a quite stripped down OS.
Reinstalling Ubuntu would now be the easiest and safest way to get it back. Take care not to delete your HOME when you do so.
If it's not too late for anyone, or if you have come across this problem lately, this is how I got it running:
I followed Mechanical snail's advice and downloaded all the packages using Synaptic. I selected all the relevant packages, basically everything with "python", "python2", "python3", "apt", "python-apt", etc., that was already installed in my computer, tagged them for reinstallation, and when I hit apply, I made sure I downloaded them only.
Then, under root, I went into the
/var/cache/apt/archives folder and ran the following command to manually re-install everything I downloaded (you will see all the packages you downloaded with Synaptic in here):
dpkg --unpack *.deb
Anyway, I was getting this
apt_pkg error whenever I would get an error message from a Python script in Aptana, and yesterday when I was trying to add a repo. Now at least I can add the repo with no problem, but I'm still getting the
apt_pkg error whenever there is an error in my Python scripts...
Running the script outside of Aptana by calling
python3 which points at 3.2 works (meaning I get the script's error without the
apt_pkg error), but if I run it with
python3.3 then the error is back.
In a fit of senseless haste I removed python 2.7 and it removed a lot of packages that were dependent on it. I could not even launch terminal.
I dropped to tty1 and did what Lois Mari Ang Laput suggested
sudo apt-get update sudo apt-get install --reinstall ubuntu-desktop
I got back the desktop and could launch terminal. Packages like shutter, mysql-workbench, that were removed needed to be reinstalled.
I checked the history in /var/log/apt and reinstalled all packages that were removed.