1.\" $NetBSD: head.1,v 1.9 2002/02/08 01:36:24 ross Exp $ 2.\" 3.\" Copyright (c) 1980, 1990, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. All advertising materials mentioning features or use of this software 15.\" must display the following acknowledgement: 16.\" This product includes software developed by the University of 17.\" California, Berkeley and its contributors. 18.\" 4. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.\" from: @(#)head.1 8.1 (Berkeley) 6/6/93 35.\" 36.Dd July 14, 1993 37.Dt HEAD 1 38.Os 39.Sh NAME 40.Nm head 41.Nd display first lines of a file 42.Sh SYNOPSIS 43.Nm 44.Op Fl n Ar count 45.Op Ar file ... 46.Sh DESCRIPTION 47This filter displays the first 48.Ar count 49lines of each of the specified files, or of the standard input if no 50files are specified. 51If 52.Ar count 53is omitted it defaults to 10. 54.Pp 55If more than a single file is specified, each file is preceded by a 56header consisting of the string 57.Dq ==\*[Gt] XXX \*[Le]= 58where 59.Dq XXX 60is the name of the file. 61.Pp 62The 63.Nm 64utility exits 0 on success, and \*[Gt]0 if an error occurs. 65.Sh COMPATIBILITY 66The historic command line syntax of 67.Nm 68is supported by this implementation. 69.Sh SEE ALSO 70.Xr tail 1 71.Sh STANDARDS 72The 73.Nm 74utility conforms to 75.St -p1003.2-92 . 76.Sh HISTORY 77The 78.Nm 79utility appeared in 80.Bx 3.0 . 81