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二周第二次课（1月30日）-kevinxliu的博客-51CTO博客
source link: http://blog.51cto.com/13578154/2066983
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2.10 环境变量PATH2.11 cp命令2.12 mv命令2.13 文档查看cat/more/less/head/tail2.10 环境变量PATH!!!回顾#which 可以查看命令的所处路径，有没有别名。#find 命令是查找整个硬盘相关的路径，但是#which 只在/usr/local/sbin:/usr/local/bin/:/usr/sbin:
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