Command:   whereis - examine system directories for a given file
Syntax:    whereis file
Flags:     (none)
Example:   whereis stat.h           # Prints: /usr/include/sys/stat.h

     Whereis searches a fixed set of  system  directories,  /bin,  /lib,
/usr/bin, and others, and prints all occurrences of the argument name in
any of them.