linux shell编程之修改环境变量

<p>啥都别说，上代码先</p>
<p>#!/bin/bash<br>dir=${PWD}<br>icepath=/opt/ICE/bin<br>oraclehome=/opt/instantclient_11_2<br>icehome=/opt/ICE<br>pypath=/opt/IcePy-3.2.1/python<br>boostpath=/usr/local/boost_143<br>boostlib=$boostpath/lib<br>icelib=$icehome/lib<br>bfinder=`echo $PATH|grep $dir`<br>echo $bfinder<br>if [ "$bfinder" == "" ]<br>then<br> echo "export PATH=/$PATH:${dir}" &gt;&gt; ~/.bash_profile<br> export PATH=$PATH:${dir}<br>fi<br><br>bfinder=`echo $PATH|grep $icepath`<br>if [ "$bfinder" == "" ]<br>then<br> echo "export PATH=/$PATH:${icepath}" &gt;&gt; ~/.bash_profile<br> export PATH=$PATH:${icepath}<br>else<br> echo "ice path have been include"<br>fi<br><br>bfinder=`echo $ORACLE_HOME|grep $oraclehome`<br>if [ "$bfinder" == "" ]<br>then<br> echo "export ORACLE_HOME=${oraclehome}"&gt;&gt;~/.bash_profile<br> export ORACLE_HOME=${oraclehome}<br>fi<br><br>bfinder=`echo $ICE_HOME|grep $icehome`<br>if [ "$bfinder" == "" ]<br>then<br> echo "export ICE_HOME=${icehome}"&gt;&gt;~/.bash_profile<br> export ICE_HOME=${icehome}<br>fi<br><br>bfinder=`echo $PYTHONPATH|grep $pypath`<br>if [ "$bfinder" == "" ]<br>then<br> echo "export PYTHONPATH=${pypath}"&gt;&gt;~/.bash_profile<br> export PYTHONPATH=${python}<br>fi</p>
<p>重要知识点 export只对当前shell有效，</p>
<p>所以结束之后需要source ~/.bash_profile</p>