which -- locate a program file in the user's path
which [-as] [command] ...
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
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 identical
to this utility. Consult the builtin(1) manual page.
The which command first appeared in FreeBSD 2.1.
builtin(1), csh(1), find(1), locate(1), whereis(1)
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 <firstname.lastname@example.org>.
FreeBSD 5.2.1 June 21, 2002 FreeBSD 5.2.1 [ Back ]