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/

!Snipaste_2023-03-26_09-05-48.png

/usr

usr注意不是 user全称为 Unix Software Resource此目录用于存储系统软件资源。FHS 建议所有开发者,应把软件产品的数据合理的放置在 /usr 目录下的各子目录中,而不是为他们的产品创建单独的目录。
Linux 系统中,所有系统默认的软件都存储在 /usr 目录下,/usr 目录类似 Windows 系统中 C:\Windows\ + C:\Program files\ 两个目录的综合体。 !Snipaste_2023-03-26_09-05-48 1.png

/var

/var 目录用于存储动态数据,例如缓存、日志文件、软件运行过程中产生的文件等。通常,此目录下建议包含如表 4 所示的这些子目录 !Snipaste_2023-03-26_09-05-48 2.png