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head: Output the first part of files
head prints the first part (10 lines by default) of each
file; it reads from standard input if no files are given or
when given a file of `-'. Synopsis:
head [option]... [file]...
If more than one file is specified,
head prints a
one-line header consisting of
==> file name <==
The program accepts the following options. Also see 2. Common options.
On older systems,
head supports an obsolete option
`-countoptions', which is recognized only if it is
specified first. count is a decimal number optionally followed
by a size letter (`b', `k', `m') as in
`l' to mean count by lines, or other option letters (`cqv').
POSIX 1003.1-2001 (see section 2.5 Standards conformance) does not allow
this; use `-c count' or `-n count' instead.
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