What is a .3 file and how do I open it?

3 file open in Microsoft Visual Studio Code Man pages contain documentation for system-level features of a Unix-based operating system. The pages are typically grouped into eight sections， .7， .4， and .8 extensions. Man pages are also commonly compressed into .GZ files (which may use the .gz.# extension). ， each of which contains documentation for a subset of system information. The third man page section describes library functions that can be used in the operating system. In particular， these sections describe C library functions. For example，。

and additional information. NOTE: Other sections' Unix man pages use the .1， the file attr_get.3 contains documentation related to the attr_get and attr_getf library functions. It includes a quick synopsis of how to use the functions， .6， .2。

a detailed description of the functions， .5。