From: Yu Chen <chen@hhmi.umbc.edu>
To: Fabio Zyserman <zyserman@fcaglp.unlp.edu.ar>
Cc: linux-admin@vger.kernel.org
Subject: Re: deleting N lines of many files
Date: Fri, 17 Dec 2004 09:01:35 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.61.0412170858111.3952@chen-pc.hhmi.umbc.edu> (raw)
In-Reply-To: <41C2D20A.70404@fcaglp.unlp.edu.ar>
you can try this, in the parent directory of all these directories, type
find ./ -name "DATA_File_name" -exec sed "1,${N}d" {} > NEW_file_name \;
should be enough, you will have both new and old files, after
confirmation, you can move new ones to overwrite old ones.
Chen
On Fri, 17 Dec 2004, Fabio Zyserman wrote:
> Hi all,
>
> I have about eighty directories,
> called data-nn, where nn=00,01,02,....
> in each of these directories I have
> among others, an (ascii) data file with many thousends
> lines. This data file has the same name in all
> directories.
>
> I would like to know if it is possible,
> via a bash script, to delete the first N
> lines in this data file in all directories.
> The modified file can overwrite the old one.
>
> Many thanks in advance,
>
> Fabio Zyserman
>
> -
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===========================================
Yu Chen
Howard Hughes Medical Institute
Chemistry Building, Rm 182
University of Maryland at Baltimore County
1000 Hilltop Circle
Baltimore, MD 21250
phone: (410)455-6347 (primary)
(410)455-2718 (secondary)
fax: (410)455-1174
email: chen@hhmi.umbc.edu
===========================================
next prev parent reply other threads:[~2004-12-17 14:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-17 12:33 deleting N lines of many files Fabio Zyserman
2004-12-17 13:07 ` zavandi
2004-12-17 14:01 ` Yu Chen [this message]
2004-12-17 20:01 ` Jeff Woods
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