whereis

whereis is a Unix command used to locate some special files of a Unix command like the binary, source and manual page files. Unix' which is usually preferred to locate binary file, because it's POSIX and it can identify shell aliases.

Here's an example usage from the man page:

Find all files in /usr/bin which are not documented in /usr/man/man1 with source in /usr/src:
example% cd /usr/bin
example% whereis -u -M /usr/man/man1 -S /usr/src -f *

External links

• man page of whereis command