whereis

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

On Linux

Linux

Locate binary, source, and man pages for SSH

whereis sshIdentify

Locate binary and man pages for ls

whereis -bm lsIdentify

Locate source of gcc and man pages for Git

whereis -s gcc -m gitIdentify

Locate binaries for gcc in /usr/bin/ only

whereis -b -B /usr/bin/ -f gccIdentify

Locate unusual binaries (those that have more or less than one binary on the system)

whereis -u *Identify

Locate binaries that have unusual manual entries (binaries that have more or less than one manual installed)

whereis -u -m *Identify