When you use *nux
man command, you’ll see number after commands or system calls. e.g.
What’s this number? It’s called section number.
The next question is, what does the section number actually mean?
|1||Executable programs or shell commands.|
|2||System calls. This functions are provided by the kernel.|
|3||Library calls. This functions are used as program libraries.|
|4||Special files. This is usually found in
|5||File formats and conventions, e.g.
|7||Miscellaneous (including macro packages and conventions), e.g.
|8||System administration commands. This is usually only for root.|
|9||Kernel routines [Non standard]|
- This list is based on Linux
mancommand (You can see it by runnning