啥都别说，上代码先

#!/bin/bash
dir=${PWD}
icepath=/opt/ICE/bin
oraclehome=/opt/instantclient_11_2
icehome=/opt/ICE
pypath=/opt/IcePy-3.2.1/python
boostpath=/usr/local/boost_143
boostlib=$boostpath/lib
icelib=$icehome/lib
bfinder=`echo $PATH|grep $dir`
echo $bfinder
if [ "$bfinder" == "" ]
then
echo "export PATH=/$PATH:${dir}" >> ~/.bash_profile
export PATH=$PATH:${dir}
fi

bfinder=`echo $PATH|grep $icepath`
if [ "$bfinder" == "" ]
then
echo "export PATH=/$PATH:${icepath}" >> ~/.bash_profile
export PATH=$PATH:${icepath}
else
echo "ice path have been include"
fi

bfinder=`echo $ORACLE_HOME|grep $oraclehome`
if [ "$bfinder" == "" ]
then
echo "export ORACLE_HOME=${oraclehome}">>~/.bash_profile
export ORACLE_HOME=${oraclehome}
fi

bfinder=`echo $ICE_HOME|grep $icehome`
if [ "$bfinder" == "" ]
then
echo "export ICE_HOME=${icehome}">>~/.bash_profile
export ICE_HOME=${icehome}
fi

bfinder=`echo $PYTHONPATH|grep $pypath`
if [ "$bfinder" == "" ]
then
echo "export PYTHONPATH=${pypath}">>~/.bash_profile
export PYTHONPATH=${python}
fi

重要知识点 export只对当前shell有效，

所以结束之后需要source ~/.bash_profile

本文转自elbertchen 51CTO博客，原文链接：http://blog.51cto.com/linkyou/751872，如需转载请自行联系原作者