Ubuntu add apt repository command not found solution

Launchpad PPA Repositories is a useful non-ubuntu personal third-party repository that can be easily installed with third-party software.

However, when running the Apt-Repository command, it is sometimes suggested that the command does not exist. In this case, apt-get Add-apt-Repository is not possible!

The solution is to install Software-Properties-common. Input command:

apt-get install software-properties-common

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