which(1) BSD General Commands Manual which(1)

NAME

 which -- locate a program file in the user's path

SYNOPSIS

 which [-as] program ...

DESCRIPTION

 The which utility takes a list of command names and searches the path for
 each executable file that would be run had these commands actually been
 invoked.
 The following options are available:
 -a List all instances of executables found (instead of just the
 first one of each).
 -s No output, just return 0 if any of the executables are found, or
 1 if none are found.
 Some shells may provide a builtin which command which is similar or iden-
 tical to this utility. Consult the builtin(1)  manual page.

SEE ALSO

 builtin(1) , csh(1) , find(1) , locate(1) , whereis(1) 

HISTORY

 The which command first appeared in FreeBSD 2.1.

AUTHORS

 The which utility was originally written in Perl and was contributed by
 Wolfram Schneider <wosch@FreeBSD.org>. The current version of which was
 rewritten in C by Daniel Papasian <dpapasia@andrew.cmu.edu>.
BSD June 21, 2002 BSD