yum install http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/pgdg-redhat94-9.4-1.noarch.rpm
yum install postgresql-server
发现如下问题：Error: Package: postgresql93-contrib-9.3.5-1PGDG.rhel6.i686 (pgdg93) Requires: libcrypto.so.10(libcrypto.so.10)
su postgres
yum install http://mirror.centos.org/centos/6/os/x86_64/Packages/openssl-1.0.1e-30.el6.x86_64.rpm
yum install postgresql-server
service postgresql-9.4 initdb
chkconfig postgresql-9.4 on
find / -name 'pg_hba.conf'
vim /var/lib/pgsql/9.4/data/pg_hba.conf
# "local" is for Unix domain socket connections only
local all all trust
# IPv4 local connections:
host all all 127.0.0.1/32 md5
host all all 172.22.8.51/24 md5
host all all 172.10.23.27/24 md5
host all all 172.22.14.51/24 md5
vim /var/lib/pgsql/9.4/data/postgresql.conf
listen_addresses = '*'
su postgres
psql
postgres=#alter user postgres with password 'new password';
postgres=#\q
yum install postgresql-odbc
=====================================================================
wget ftp://ftp.unixodbc.org/pub/unixODBC/unixODBC-2.3.2.tar.gz
tar xvf unixODBC-2.3.2.tar
cd unixODBC-2.3.2
./configure --prefix=/usr/local/unixODBC-2.3. --includedir=/usr/include
--libdir=/usr/lib -bindir=/usr/bin --sysconfdir=/etc
make
make install
这时，unixodbc已经安装完毕，这时候可以使用odbc的通用api进行编程了。
但是如果要操作具体的数据库，还需要相应数据库提供的odbc驱动，比如操作mysql的ODBC驱动，下载地址是：http://dev.mysql.com/downloads/connector/odbc/5.1.html。
