where

Report all known instances of command in path.

SYNTAX
       where command

Report all known instances of command, including aliases, builtins and executables in path.

"Work like you don't need the money, love like you've never been hurt, and dance like nobodys watching" - Satchel 'Satchmo' Paige

Related commands:

find - Search for files that meet a desired criteria
grep - Search file(s) for lines that match a given pattern
ln - Make links between files (hard links, symbolic links)
ls - List information about file(s)
locate - Find files
which - Locate a program file in the user's path

Equivalent BASH command:

whereis - Locate the binary, source, and manual page files for specified commands/files.