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

# To locate binary, source and man pages for ssh:
whereis <ssh>

# To locate binary and man pages for ls:
whereis -bm <ls>

# To locate source of gcc and man pages for git:
whereis -s <gcc> -m <git>

# To locate binaries for gcc in /usr/bin/ only:
whereis -b -B </usr/bin/> -f <gcc>