RHEL5.5默認的源里沒有postgresql9的包，需要下載源。下載地址 ：http://yum.postgresql.org/9.2/redhat/rhel-5-x86_64/pgdg-redhat92-9.2-7.noarch.rpm
然后安裝源
rpm -ivh pgdg-redhat92-9.2-7.noarch.rpm
最后安裝postgresql92
yum install postgresql92 postgresql92-server postgresql92-devel
初始化數據庫
service postgresql-9.2 initdb Initializing database: [ OK ]
啟動數據庫
/etc/init.d/postgresql-9.2 start Starting postgresql-9.2 service: [ OK ]
查看數據狀態
netstat -nutlap | grep post tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN 21627/postmaster udp 0 0 127.0.0.1:12823 127.0.0.1:12823 ESTABLISHED 21627/postmaster