which(1)

NAME

   which - locate a command

SYNOPSIS

   which [-a] filename ...

DESCRIPTION

   which  returns  the  pathnames  of  the files (or links) which would be
   executed in the current environment, had its arguments  been  given  as
   commands  in  a  strictly  POSIX-conformant  shell.   It  does  this by
   searching the PATH for executable  files  matching  the  names  of  the
   arguments. It does not canonicalize path names.

OPTIONS

   -a     print all matching pathnames of each argument

EXIT STATUS

   0      if all specified commands are found and executable

   1      if  one  or  more  specified  commands  is  nonexistent  or  not
          executable

   2      if an invalid option is specified

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