linux下
　　1、 去官网下载安装包
　　比如对应11gr2的
oracle-instantclient11.2-basic-11.2.0.1.0-1.i386.rpm
oracle-instantclient11.2-devel-11.2.0.1.0-1.i386.rpm
oracle-instantclient11.2-sqlplus-11.2.0.1.0-1.i386.rpm
　　2、 copy到linux上执行安装
　　rpm -ivh XXX.rpm
　　3、 配置环境变量
　　编辑vi .bashrc，追加
export ORACLE_HOME=/usr/lib/oracle/11.2/client
export TNS_ADMIN=$ORACLE_HOME/network/admin
export NLS_LANG='simplified chinese_china'.ZHS16GBK
export LD_LIBRARY_PATH=$ORACLE_HOME/lib
export PATH=$ORACLE_HOME/bin:$PATH
　　手动创建目录$ORACLE_HOME/network/admin
　　并在这个目录下创建编辑文件tnsnames.ora
　　添加链接串
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.9.76)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
)
)
　　4、 执行命令source .bashrc生效修改内容，测试连接sqlplus
　　5、 如果出现sqlplus: error while loading shared libraries: libaio.so.1: cannot open shared object file: No such file or directory
　　则安装相应包即可