Find the source, binary, and man page for a command.
whereis [options] command
-b searches only for binaries.
-m searches only for man pages.
-s searches only for sources.
The whereis command searches the usual directories (where binaries, man pages, and source files are located) for binaries, man pages, and source files for a command. For example, here is the result of searching for the files for the rpm command:
whereis rpm rpm: /bin/rpm /usr/lib/rpm /usr/include/rpm /usr/man/man8/rpm.8