参考官方文档
已16.04
为例
1、创建/etc/apt/sources.list.d/pgdg.list
文件
deb http://apt.postgresql.org/pub/repos/apt/ xenial-pgdg main
2、导入安装密钥
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo apt-get update
3、
sudo apt-get install postgresql-9.6