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+.\" Copyright (c) 1989, 1990, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)whatis.1	8.1 (Berkeley) 6/6/93
+.\"
+.Dd June 6, 1993
+.Dt WHATIS 1
+.Os BSD 4
+.Sh NAME
+.Nm whatis
+.Nd describe what a command is
+.Sh SYNOPSIS
+.Nm whatis
+.Op Fl M Ar path
+.Op Fl m Ar path
+.Ar command Ar ...
+.Sh DESCRIPTION
+.Nm Whatis
+looks up a given command and gives the header line from the manual page.
+You can then use the
+.Xr man 1
+command to get more information.
+.Pp
+The options are as follows:
+.Bl -tag -width Fl
+.It Fl M Ar path
+Override the list of standard directories
+.Nm whatis
+searches for its database named
+.Dq Pa whatis.db .
+The supplied
+.Ar path
+must be a colon
+.Dq \&:
+separated list of directories.
+This search path may also be set using the environment variable
+.Ev MANPATH .
+.It Fl m Ar path
+Augment the list of standard directories
+.Nm whatis
+searches for its database named
+.Dq Pa whatis.db .
+The supplied
+.Ar path
+must be a colon
+.Dq \&:
+separated list of directories.
+These directories will be searched before the standard directories
+or the directories supplied with the
+.Fl M
+option or the
+.Ev MANPATH
+environment variable are searched.
+.El
+.Sh ENVIRONMENT
+.Bl -tag -width MANPATH
+.It Ev MANPATH
+The standard search path used by
+.Xr man 1
+may be overridden by specifying a path in the
+.Ev MANPATH
+environment variable.
+.El
+.Sh FILES
+.Bl -tag -width whatis.db
+.It Pa whatis.db
+name of the whatis database
+.El
+.Sh SEE ALSO
+.Xr apropos 1 ,
+.Xr man 1 ,
+.Xr whereis 1
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 3.0 .