xref: /freebsd/usr.bin/head/head.1 (revision e14ddd1f16e7e5788392c50de21ea7c927e0690c)
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28.\"	@(#)head.1	8.1 (Berkeley) 6/6/93
29.\" $FreeBSD$
30.\"
31.Dd March 16, 2013
32.Dt HEAD 1
33.Os
34.Sh NAME
35.Nm head
36.Nd display first lines of a file
37.Sh SYNOPSIS
38.Nm
39.Op Fl n Ar count | Fl c Ar bytes
40.Op Ar
41.Sh DESCRIPTION
42This filter displays the first
43.Ar count
44lines or
45.Ar bytes
46of each of the specified files, or of the standard input if no
47files are specified.
48If
49.Ar count
50is omitted it defaults to 10.
51.Pp
52If more than a single file is specified, each file is preceded by a
53header consisting of the string
54.Dq ==> XXX <==
55where
56.Dq XXX
57is the name of the file.
58.Sh EXIT STATUS
59.Ex -std
60.Sh EXAMPLES
61To display the first 500 lines of the file
62.Ar foo :
63.Pp
64.Dl $ head -n 500 foo
65.Pp
66.Nm
67can be used in conjunction with
68.Xr tail 1
69in the following way to, for example, display only line 500 from the file
70.Ar foo :
71.Pp
72.Dl $ head -n 500 foo | tail -n 1
73.Sh SEE ALSO
74.Xr tail 1
75.Sh HISTORY
76The
77.Nm
78command appeared in PWB UNIX.
79