linux添加环境变量

环境变量通常用于存储路径列表

PATH=/usr/bin;/bin

LD_LIBRARY_PATH=/usr/lib;/lib

注意：shell执行二进制文件时会首先找/usr/bin,然后找/bin

 

任务1：将myapp安装到/opt/myapp中，他的二进制在bin目录中，库文件在lib目录中

方法：

export PATH=/opt/myapp/bin;$PATH

export LD_LIBRARY_PATH=/opt/myapp/lib;$LD_LIBRARY_PATH

 

//PATH=/opt/myapp/bin:/usr/bin:/bin

//LD_LIBRARY_PATH=/opt/myapp/lib:/usr/lib;/lib

 

方法2：

把下面的函数加入.bashrc

prepend() {[ -d "$2" ] && eval $1=\"$2':' \$$1\" && export $1;}

 

prepend PATH /opt/myapp/bin

prepend LD_LIBRARY_PATH /opt/myapp/lib