add-apt-repository not found

• How to add a PPA on a server?

sudo add-apt-repository ppa:ondrej/php-7.0
# sudo: add-apt-repository: command not found
sudo apt-get install software-properties-common
# sudo apt-get install python-software-properties # 13.10  이전
sudo add-apt-repository ppa:ondrej/php-7.0