whereis

Locate the binary, source, and manual page files for a command.

Locate binary, source and man pages for ssh:

whereis {{ssh}}

Locate binary and man pages for ls:

whereis -bm {{ls}}

Locate source of gcc and man pages for Git:

whereis -s {{gcc}} -m {{git}}

Locate binaries for gcc in /usr/bin/ only:

whereis -b -B {{/usr/bin/}} -f {{gcc}}