1.下载oracle-instantclient11.2-basic-11.2.0.4.0-1.x86_64.rpm 

   oracle-instantclient11.2-devel-11.2.0.4.0-1.x86_64.rpm 

   oracle-instantclient11.2-sqlplus-11.2.0.4.0-1.x86_64.rpm

2.查看rpm包的默认安装路径

[root tmp]# rpm -qpl oracle-instantclient-sqlplus-10.2.0.5-1.x86_64.rpm  /usr/bin/sqlplus64 /usr/lib/oracle/10.2.0.5/client64/bin/sqlplus /usr/lib/oracle/10.2.0.5/client64/lib/glogin.sql 

3.依次执行如下命令:

[root tmp]# rpm -ivh --relocate /usr=/oracle oracle-instantclient-basic-10.2.0.5-1.x86_64.rpm 

[root tmp]# rpm -ivh --relocate /usr=/oracle oracle-instantclient-devel-10.2.0.5-1.x86_64.rpm [root tmp]# rpm -ivh --relocate /usr=/oracle oracle-instantclient-sqlplus-10.2.0.5-1.x86_64.rpm

3.sqlnet.ora和tnsnames.ora创建

这两个文件默认是不存在，所以要手工创建 [root tmp]# mkdir -p /oracle/lib/oracle/10.2.0.5/client64/network/admin

然后在admin目录下创建这两个文件

sqlnet.ora内容如下:

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

tnsnames.ora内容如下：

别名 =

  (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = 要连接的数据库IP )(PORT = 端口))     (CONNECT_DATA =       (SERVICE_NAME = orcl)     )   )