从LD_LIBRARY_PATH中删除条目

Question

我正在试验Linux共享库并export LD_LIBRARY_PATH=/path/to/library:${LD_LIBRARY_PATH}在$ LD_LIBRARY_PATH中添加了一个entry().现在我希望它消失了.我怎样才能做到这一点？

PS.echo $LD_LIBRARY_PATH在我添加条目之前打字给了我一个空行.现在它说:

路径/到/库:

Answer 1

如果以前它给你空行(它很可能)意味着没有设置变量(默认情况下没有设置),所以你可以取消它:

unset LD_LIBRARY_PATH

其他一些实验选择:

export MY_PATH=/my/path
export MY_PATH2=/my/path2
export LD_LIBRARY_PATH="${MY_PATH}:${MY_PATH2}"
echo $LD_LIBRARY_PATH
/my/path:/my/path2

从末尾删除路径:

export LD_LIBRARY_PATH="${LD_LIBRARY_PATH/:${MY_PATH2}/}"
echo $LD_LIBRARY_PATH
/my/path

类似地,从头开始删除路径(如果设置如上):

export LD_LIBRARY_PATH="${LD_LIBRARY_PATH/${MY_PATH}:/}"