在man里面查看unix/linux命令时,命令名后面括号中的数字有什么含义?

比如
man ls,显示为LS(1)
man fread,显示为FREAD(3)

这其实是代表对应的命令在man中的章节号,具体编号如下:

1. General commands
2. System calls
3. C library functions
4. Special files (usually devices, those found in /dev) and drivers
5. File formats and conventions
6. Games and screensavers
7. Miscellanea
8. System administration commands and daemons

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