https://www.postgresql.org/download/linux/ubuntu/
1 check Xenial16.04
2 创建文件 /etc/apt/sources.list.d/pgdg.list
添加 deb http://apt.postgresql.org/pub/repos/apt/ xenial-pgdg main
3 添加key
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
4 update
sudo apt-get update
5 install
sudo apt-get install postgresql-9.6
6 connect to postgresql
sudo su - postgres
psql
7 查看登录用户信息
postgres-# \conninfo
8退出
postgres-# \q
linux mint 18.2 install postgresql
原文：http://www.cnblogs.com/or2-/p/7572371.html