whereis —
locate programs
  
    | whereis | [ -p] program
      [program ...] | 
The whereis utility checks the standard binary
  directories for the specified programs, printing out the paths of any it
  finds.
The default path searched is the string returned by the
    sysctl(8) utility for the
    “user.cs_path” string. If the [-p]
    option is specified, then the value of the environment variable
    PATH is used instead.
The whereis utility exits 0 on success, 1 on general
  error, 2 if only some programs were located and 3 if none were.
The historic flags and arguments for the whereis utility
  are no longer available in this version.
The whereis command appeared in
  3.0BSD.