Bash $ PATH会缓存每个修改 [英] Bash $PATH is caching every modification

问题描述

如何清除BASH中$ PATH的缓存.每次我修改$ PATH时，以前的修改也会保存下来！因此，我的$ PATH已经是一个页面了:-)，它困扰着我，因为它指向了一些不合适的地方(因为每次修改都被附加在$ PATH变量的末尾).请帮我解决这个问题.

How to clear the cache of $PATH in BASH. Every time I modify the $PATH, the former modifications are conserved too! So my $PATH is already one page :-), and it bothers me to work, because it points to some not right places (because every modification is being appended in the end of the $PATH variable). Please help me to solve this problem.

推荐答案

因为每个修改都在进行中 附加在$ PATH的末尾 变量

because every modification is being appended in the end of the $PATH variable

仔细查看您在哪里设置$PATH，我敢打赌它看起来像这样:

Take a close look at where you are setting $PATH, I bet it looks something like this:

PATH="$PATH:/some/new/dir:/another/newdir:"

在新作业中具有$PATH，可为您提供不需要的附加行为.

Having $PATH in the new assignment gives you the appending behavior you don't want.

相反，这样做:

PATH="/some/new/dir:/another/newdir:"

更新

如果要删除所有重复条目的$PATH，但仍保持原始顺序，则可以执行以下操作:

Update

If you want to strip $PATH of all duplicate entries but still maintain the original order then you can do this:

PATH=$(awk 'BEGIN{ORS=":";RS="[:\n]"}!a[$0]++' <<<"${PATH%:}")

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