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$path 表明的是体系的指令查找途径，和windows的%path%是相同的 $home 则表明是用户的主目录，也便是用户登录后工作目录 楼主如果想要学习 linux工程师 这方面的知识的话可以.
Creating a Sense of Home BJUtoday
Home.bju.edu New Bju Homeschool Feature That Makes Planning A Breeze
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