你是否会有这样的需求呢：在Linux/Mac系统下，需要安装同一软件的不同版本，然后通过修改PATH环境变量，使新安装的版本生效？这个时候，可能就要小心了。我就遇到了这样的一个问题。
奇怪的问题Mac系统已经自带有Python，然而由于与其他软件的兼容问题，需要同时安装原生的Python。于是：12
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Though working with Makefile for quite a long time, I think I would never get a deeper insight into the fact beneath the “$(PWD)” and “$(shell pwd)” u
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Put Commands in Variables NOT Working
Word Splitting
Redirection
Redirection Hacking
Welcome to Hexo! This is your very first post. Check documentation for more info. If you get any problems when using Hexo, you can find the answer in
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