1.\" Copyright (c) 1980, 1990, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)head.1 8.1 (Berkeley) 6/6/93 29.\" $FreeBSD: src/usr.bin/head/head.1,v 1.4.2.6 2002/07/15 06:33:12 keramida Exp $ 30.\" 31.Dd June 19, 2020 32.Dt HEAD 1 33.Os 34.Sh NAME 35.Nm head 36.Nd display the first part of files 37.Sh SYNOPSIS 38.Nm 39.Op Fl q | Fl v 40.Op Fl n Ar count | Fl c Ar bytes 41.Op Ar 42.Sh DESCRIPTION 43This filter displays the first 44.Ar count 45lines or 46.Ar bytes 47of each of the specified files, or of the standard input if no 48files are specified. 49If 50.Ar count 51is omitted it defaults to 10. 52.Pp 53If more than a single file is specified, or the 54.Fl v 55flag is used, each file is preceded by a header consisting of the string 56.Dq ==> XXX <== 57where 58.Dq XXX 59is the name of the file. 60The 61.Fl q 62flag disables the printing of the header in both cases. 63.Sh EXIT STATUS 64.Ex -std 65.Sh COMPATIBILITY 66The historic command line syntax of 67.Nm 68is supported by this implementation. 69.Pp 70This command is mostly compatible with GNU extensions to 71.Nm . 72.Sh SEE ALSO 73.Xr tail 1 74.Sh STANDARDS 75The 76.Nm 77utility conforms to 78.St -p1003.2-92 . 79.Sh HISTORY 80The 81.Nm 82command appeared in PWB 83.Ux . 84