【问题】man手册如何查看区分printf命令和printf函数
参考：UNIX / Linux Man Command Example to View Man Pages
今天再看别人博客的时候，先仔细看看printf命令是怎么玩的，于是man手册查了下。结果搜出来的确释C下面的printf函数，那我想看printf命令咋整呢？
简单的说，man手册也是分块的，如下
- 1 – Executable programs or commands
- 2 – System calls ( functions provided by the kernel )
- 3 – Library calls ( functions provided by the library )
- 4 – Special files
- 5 – File formats and conventions ( configuration files )
- 6 – Games
- 7 – Miscellaneous
- 8 – System administration commands
man 1 printf
man 3 printf
