which(1)

NAME
     which - examine $PATH to see which file will be executed

SYNOPSIS
     which name

EXAMPLES

     which a.out         # Tells which a.out will be executed

DESCRIPTION

     The $PATH shell variable controls the MINIX search rules.  If  a  command
     a.out  is  given, the shell first tries to find an executable file in the
     working directory. If that fails, it looks in various system directories,
     such  as  /bin  and /usr/bin. The which command makes the same search and
     gives the absolute path of the program that will be chosen,  followed  by
     other occurrences of the file name along the path.

SEE ALSO
     man(1).