Apt "could not find a distribution template" error
Easy to fix Just do this
gksudo gedit /etc/lsb-release
Then edit the file that opens so that it looks like this
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=10.04
DISTRIB_CODENAME=karmic
DISTRIB_DESCRIPTION="Ubuntu Karmic Koala"
Remember to enter which version of ubuntu you are using. I am using karmic koala so I put that in.
You can get a list here towards the bottom
http://en.wikipedia.org/wiki/Ubuntu_%28operating_system%29
Then go back to the terminal after you have saved the lsb-release file and you should be able to add-apt-repository
The content of /etc/lsb-release is invalid. You'll need to re-install the base-files package to restore its intended content. Unfortunately you can't just use apt-get for the job. Instead,
go to https://launchpad.net/ubuntu/+source/base-files and look for the section for your Ubuntu release,
download the most recent version of the package available for your release and architecture,
-
run:
sudo dpkg -i /your/path/to/base-files_*.deb -
Make a test run with
sudo apt-get install --reinstall base-files