Ubuntu - -bash: add-apt-repository: command not found

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Ubuntu - -bash: add-apt-repository: command not found

Ошибка вида:

#  add-apt-repository ppa:certbot/certbot
-bash: add-apt-repository: command not found

Решение - доустановить пакет python-software-properties:

# apt-get install software-properties-common python-software-properties -y