software installation - Unable to locate package add-apt-repository error - Ask Ubuntu

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-common

not python-software-properties as you may think. You can check this using the following command:

dpkg -S add-apt-repository

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