PostgreSQL安装（CentOS7）
1、yum install https://download.postgresql.org/pub/repos/yum/9.6/redhat/rhel-7-x86_64/pgdg-centos96-9.6-3.noarch.rpm
waiting....
选择y，继续..
2、yum install postgresql96-server postgresql96-contrib
waiting....
选择y，继续..
3、/usr/pgsql-9.6/bin/postgresql96-setup initdb
waiting....
初始化数据库..
4、systemctl start postgresql-9.6
启动数据库
5、systemctl enable postgresql-9.6
5、iptables -I INPUT -p tcp --dport 5432 -m state --state NEW -j ACCEPT
iptables-save > /etc/sysconfig/iptables
开放端口
firewall-cmd --add-service=postgresql --permanent
firewall-cmd --reload
7、修改密码
su - postgres
psql -U postgres
alter user postgres with password 'postgres@123456'
\q
exit
8、 允许远程访问
#配置文件中，默认只能本机访问postgresql；
vi /var/lib/pgsql/9.6/data/postgresql.conf
修改listen_addresses = 'localhost'为listen_addresses = '*'，允许所有远程访问
vim /var/lib/pgsql/9.6/data/pg_hba.conf
添加host all all 0.0.0.0/0 trust
systemctl restart postgresql-9.6.service
参考：http://blog.csdn.net/DaSo_CSDN/article/details/75330009
http://www.jb51.net/article/104829.htm
https://www.linuxidc.com/Linux/2017-10/147536.htm
