Install Postgresql Server 9.3

first,we need to add official postgresql repository for yum:

sudo yum install http://yum.postgresql.org/9.3/redhat/rhel-6-x86_64/pgdg-redhat93-9.3-1.noarch.rpm

second,install by yum:

sudo yum install postgresql93-server postgresql93-contrib

after that,init database:

sudo service postgresql-9.3 initdb

finally,set postgresql service start automatically:

sudo chkconfig postgresql-9.3 on

And,startt the server:

sduo service postgresql-9.3 start

Configure Server for user access

change password for user postgres:

sudo passwd postgres

su as postgres,and log into pg sql server to set password of postgres on pgsql sever:

[Ivar@localhost ~]$ su - postgres
密码：
-bash-4.1$ psql
psql (9.3.4)
输入 "help" 来获取帮助信息.
postgres=# alter user postgres with password 'postgres'

Quit from user postgresql shell,and vim open postgresql.conf

sudo vim /var/lib/pgsql/9.3/data/postgresql.conf

change the value of lisen_address to '*",means server would lisent on all IP addresses:

# - Connection Settings -
listen_addresses = '*' # what IP address(es) to listen on;

save and open pg_hba.conf add the ip address or segment you would allow them to get connected on pgsql server:

sudo vim /var/lib/pgsql/9.3/data/pg_hba.conf

# TYPE DATABASE USER ADDRESS METHOD

# "local" is for Unix domain socket connections only
local all all md5
# IPv4 local connections:
host all all 127.0.0.1/32 md5
host all all 192.168.0.0/24 md5
host all all 192.168.84.0/24 md5
host all all 192.168.184.0/24 md5
# IPv6 local connections:
host all all ::1/128 md5

Note,here 192.168.0.0/24 means an IP segment from 192.168.0.1 to 192.168.0.255

/24 meas its mask is 255.255.255.0 (24 bits).

change fire wall policy for connection access from port 5432:

[Ivar@localhost ~]$ sudo /sbin/iptables -I INPUT -p tcp --dport 5432 -j ACCEPT
[Ivar@localhost ~]$ sudo service iptables save
iptables：将防火墙规则保存到 /etc/sysconfig/iptables： [确定]
[Ivar@localhost ~]$ sudo service iptables restart
iptables：将链设置为政策 ACCEPT：filter [确定]
iptables：清除防火墙规则： [确定]
iptables：正在卸载模块： [确定]
iptables：应用防火墙规则： [确定]
[Ivar@localhost ~]$ sudo service iptables status
表格：filter
Chain INPUT (policy ACCEPT)
num target prot opt source destination
1 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:5432
2 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
3 ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0
4 ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
5 ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22
6 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited

Chain FORWARD (policy ACCEPT)
num target prot opt source destination
1 REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited

Chain OUTPUT (policy ACCEPT)
num target prot opt source destination

restart server

sudo service postgresql-9.3 restart

create user for your own,here mine is Ivar:

[Ivar@localhost ~]$ psql -h localhost -U postgres
用户 postgres 的口令：
psql (9.3.4)
输入 "help" 来获取帮助信息.

postgres=# CREATE ROLE admin
postgres-# NOSUPERUSER INHERIT CREATEDB CREATEROLE REPLICATION;
CREATE ROLE
postgres=# CREATE USER 'Ivar' WITH PASSWORD 'password';
CREATE ROLE

logon by your own user and create test database

[Ivar@localhost ~]$ psql postgresql

postgres=# CREATE DATABASE test