Linux安装PostgreSQL9.0
以前对PostgreSQL研究比较少，这几天没事就对这个数据库研究一下，第一步当然是安装了
相关软件可在在官网上下载：http://www.postgresql.org/download/
其实安装也比较简单，现将软件SSH到root用户下（注意，只能在root用户下安装）
[root@rhsde opt]# chmod 777 postgresql-9.0.8-1-linux-x64.run
[root@rhsde opt]# ./postgresql-9.0.8-1-linux-x64.run
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Welcome to the PostgreSQL Setup Wizard.
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Please specify the directory where PostgreSQL will be installed.
Installation Directory [/opt/PostgreSQL/9.0]:
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Please select a directory under which to store your data.
Data Directory [/opt/PostgreSQL/9.0/data]:
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Please provide a password for the database superuser (postgres). A locked Unix
user account (postgres) will be created if not present.
Password :
Retype password :
----------------------------------------------------------------------------
Please select the port number the server should listen on.
Port [5432]:
//相关字符集的选择
.....
[628] zh_SG.utf8
[629] zh_TW.euctw
[630] zh_TW.utf8
[631] zu_ZA
[632] zu_ZA.iso88591
[633] zu_ZA.utf8
Please choose an option [1] :
----------------------------------------------------------------------------
Setup is now ready to begin installing PostgreSQL on your computer.
Do you want to continue? [Y/n]: y
----------------------------------------------------------------------------
Please wait while Setup installs PostgreSQL on your computer.
Installing
0% ______________ 50% ______________ 100%
#########################################
----------------------------------------------------------------------------
Setup has finished installing PostgreSQL on your computer.
1：PostgreSQL软件装在什么地方
2：PostgreSQL的数据Data放在什么地方
3：为超级用户postgres设置密码以及确认
4：设置端口号默认的是5432
5：选择字符集
6：是否继续
如果安装成功后，我们可以看到，系统会自动创建一个postgres用户，他所在的路径为你选择的PostgreSQL安装的路径，不过该用户的环境变量没有设置好，我们需要设置一下即可
[root@rhsde opt]# su - postgres
-bash-3.2$ pwd
/opt/PostgreSQL/9.0
-bash-3.2$ su -
Password:
[root@rhsde ~]# cp .bash_profile /opt/PostgreSQL/9.0
[root@rhsde ~]# cp .bashrc /opt/PostgreSQL/9.0
[root@rhsde ~]# su - postgres然后就是，虽然是root用户下安装，那么安装的文件的权限所属的是root用户，那么我们需要将这些文件转为postgres用户
[root@rhsde PostgreSQL]# ll
total 4
drwxr-xr-x 12 root daemon 4096 8月 24 08:52 9.0
[root@rhsde PostgreSQL]# pwd
/opt/PostgreSQL
[root@rhsde PostgreSQL]# chown -R postgres:postgres /opt/PostgreSQL/
[root@rhsde PostgreSQL]# ll
total 4
drwxr-xr-x 12 postgres postgres 4096 8月 24 08:52 9.0然后设置postgres用户的环境变量
export PGHOME=/opt/PostgreSQL/9.0
export PATH=$PGHOME/bin:$PATH
export PGDATA=$PGHOME/data
export LD_LIBRARY_PATH=$PGHOME/lib然后我们可以启动服务，其实默认服务以及启动了
[root@rhsde ~]# service postgresql-9.0 start
Starting PostgreSQL 9.0:
pg_ctl: another server might be running; trying to start server anyway
pg_ctl: could not start server
Examine the log output.
PostgreSQL 9.0 did not start in a timely fashion, please see /opt/PostgreSQL/9.0/data/pg_log/startup.log for details[root@rhsde ~]# more /opt/PostgreSQL/9.0/data/pg_log/startup.log
2012-08-24 00:56:54 GMT FATAL: lock file "postmaster.pid" already exists
2012-08-24 00:56:54 GMT HINT: Is another postmaster (PID 27765) running in data direc
tory "/opt/PostgreSQL/9.0/data"?我们也可以检查一下服务状态和端口情况
[root@rhsde ~]# chkconfig --list postgresql-9.0
postgresql-9.0 0:off 1:off 2:on 3:on 4:on 5:on 6:off
[root@rhsde ~]# netstat -ano | grep 5432
tcp 0 0 0.0.0.0:5432 0.0.0.0:* LISTEN off (0.00/0/0)
tcp 0 0 :::5432 :::* LISTEN off (0.00/0/0)
unix 2 [ ACC ] STREAM LISTENING 3759370 /tmp/.s.PGSQL.5432那么我们可以验证一下是否可以连接上
[postgres@rhsde ~]$ cd scripts/
[postgres@rhsde scripts]$ ls
images launchpsql.sh runpsql.sh xdg
launchbrowser.sh launchstackbuilder.sh runstackbuilder.sh
launchpgadmin.sh launchsvrctl.sh serverctl.sh
[postgres@rhsde scripts]$ ./runpsql.sh
Server [localhost]:
Database [postgres]:
Port [5432]:
Username [postgres]:
Password for user postgres:
psql.bin (9.0.8)
Type "help" for help.
postgres=#如果其他机器连接该数据库服务器，我们还要修改/opt/PostgreSQL/9.0/data/pg_hba.conf文件
如果软件安装完毕，我们也可以在Linux的开始菜单看到相关的信息
其实最简单的方法如下
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