Date: Sun, 21 Dec 2008 07:42:47 +0200 From: Giorgos Keramidas <keramida@ceid.upatras.gr> To: Gary Kline <kline@thought.org> Cc: FreeBSD Mailing List <freebsd-questions@freebsd.org> Subject: Re: Sed question Message-ID: <877i5unkx4.fsf@kobe.laptop> In-Reply-To: <20081221053407.GA87868@thought.org> (Gary Kline's message of "Sat, 20 Dec 2008 21:34:10 -0800") References: <20081221053407.GA87868@thought.org>
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On Sat, 20 Dec 2008 21:34:10 -0800, Gary Kline <kline@thought.org> wrote:
> how can i delete, say, lines 8,9,and 10 from 200 files
> using sed? Is it
>
> sed '8,10d'< file> newfile
> or is there a better way?
Use in-place editing:
keramida@kobe:/tmp$ cat -n foo
1 foo
2 bar
3 baz
keramida@kobe:/tmp$ sed -i '' -e '2d' foo
keramida@kobe:/tmp$ cat -n foo
1 foo
2 baz
keramida@kobe:/tmp$
Look at the manpage of sed for more details about the -i option, and
consider using backup files while you are running tests. In-place
editing is very cool, but it can also make changes that are difficult
to recover from.
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