Unable to locate package add-apt-repository error [closed]
add-apt-repository is not a package, so you just can't install it using sudo apt-get install add-apt-repository. This is wrong!
The package which contain add-apt-repository command is (and was all the time):
software-properties-commonnot python-software-properties as you may think. You can check this using the following command:
dpkg -S add-apt-repository