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Diffstat (limited to 'static/freebsd/man1/head.1')
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diff --git a/static/freebsd/man1/head.1 b/static/freebsd/man1/head.1 new file mode 100644 index 00000000..023ee5a7 --- /dev/null +++ b/static/freebsd/man1/head.1 @@ -0,0 +1,105 @@ +.\" 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. +.\" +.Dd June 12, 2022 +.Dt HEAD 1 +.Os +.Sh NAME +.Nm head +.Nd display first lines of a file +.Sh SYNOPSIS +.Nm +.Op Fl qv +.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. +.Pp +Both +.Ar count +and +.Ar bytes +may also be specified with size suffixes supported by +.Xr expand_number 3 . +.It Fl q , Fl -quiet , Fl -silent +Suppresses printing of headers when multiple files are being examined. +.It Fl v , Fl -verbose +Prepend each file with a header. +.El +.Pp +If more than a single file is specified, or if the +.Fl v +option is used, each file is preceded by a +header consisting of the string +.Dq ==> XXX <== +where +.Dq XXX +is the name of the file. +The +.Fl q +flag disables the printing of the header in all cases. +.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 , +.Xr expand_number 3 +.Sh HISTORY +The +.Nm +command appeared in PWB UNIX. |
