如何避免在ksh中复制路径变量 [英] How to keep from duplicating path variable in ksh

问题描述

与>如何避免在csh . 但是我不使用csh.

Similar question to How to keep from duplicating path variable in csh. But I don't use csh.

PATH=${SOMETHING}:${PATH}

如何从PATH中删除重复项.

How do I remove duplicates from PATH.

推荐答案

我使用此oneliner，但这取决于gawk.

I use this oneliner, but it depends on gawk.

PATH=$(echo $PATH|tr ":" "\n"|gawk '!($0 in a) { a[$0];print}'|paste -sd: - )

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