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Editing: head.1
.\" Copyright (c) 1980, 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. 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. .\" .\" @(#)head.1 8.1 (Berkeley) 6/6/93 .\" $FreeBSD$ .\" .Dd April 10, 2018 .Dt HEAD 1 .Os .Sh NAME .Nm head .Nd display first lines of a file .Sh SYNOPSIS .Nm .Op Fl n Ar count | Fl c Ar bytes .Op Ar .Sh DESCRIPTION This filter displays the first .Ar count lines or .Ar bytes of each of the specified files, or of the standard input if no files are specified. If .Ar count is omitted it defaults to 10. .Pp The following options are available: .Bl -tag -width indent .It Fl c Ar bytes , Fl -bytes Ns = Ns Ar bytes Print .Ar bytes of each of the specified files. .It Fl n Ar count , Fl -lines Ns = Ns Ar count Print .Ar count lines of each of the specified files. .El .Pp If more than a single file is specified, each file is preceded by a header consisting of the string .Dq ==> XXX <== where .Dq XXX is the name of the file. .Sh EXIT STATUS .Ex -std .Sh EXAMPLES To display the first 500 lines of the file .Ar foo : .Pp .Dl $ head -n 500 foo .Pp .Nm can be used in conjunction with .Xr tail 1 in the following way to, for example, display only line 500 from the file .Ar foo : .Pp .Dl $ head -n 500 foo | tail -n 1 .Sh SEE ALSO .Xr tail 1 .Sh HISTORY The .Nm command appeared in PWB UNIX.
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