# 鍵の追加 - ap-get updateで文句いわれたら、ウマいのを追加する。
sudo apt install -y debian-keyring debian-archive-keyring dirmngr
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 8B48AD6246925553 7638D0442B90D010 EF0F382A1A7B6500
# https://backports.debian.org/Instructions/
# backports レポジトリの追加
#
# jessie-backports
echo 'deb http://httpredir.debian.org/debian jessie-backports main contrib non-free' | sudo tee -a /etc/apt/sources.list.d/jessie-backports.list
#
# stretch-backports
# echo 'deb http://httpredir.debian.org/debian stretch-backports main contrib non-free' | sudo tee -a /etc/apt/sources.list.d/stretch-backports.list
# パッケージ情報更新
sudo apt update
# インストール (backportsレポジトリを指定)
sudo apt-get -t jessie-backports install phantomjs