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Full Discussion: Append (cat) to beginning of file ?
Top Forums Shell Programming and Scripting Append (cat) to beginning of file ? Post 44665 by CBZ on Tuesday 9th of December 2003 03:49:32 PM
Old 12-09-2003
Question Append (cat) to beginning of file ?
Hi,

Fairly new to unix scripting, hoping to get some help.

using AIX v5

Basically I have 3 files 1). Header record 2). many detail record 3). Trailer record

My desired result is 1 file which contains Heaeder, Detail, Trailer


Currenty I am using a series of:
cat detail >> header
rm detail
cat trailer >> header
rm trailer
mv header detail

Now the problem with this approach is that my detail file quite often is in excess of 5gb, so the time is takes to do the cat seems like a waste of time to me. I would really like to be able to concatenate the header to the beginning of the detail and only "move" the one record.

Any ideas would be appreciated.

Thanks,
 

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LEARN ABOUT SUSE

ragator

RAGATOR(1)						      General Commands Manual							RAGATOR(1)

NAME

       ragator - aggregate argus(8) data file entries.

COPYRIGHT

       Copyright (c) 2000-2003 QoSient. All rights reserved.

SYNOPSIS

       ragator [-f ragator.conf] [raoptions]

DESCRIPTION

       Ragator	reads argus(8) data from an argus-file, and merges matching argus flow activity records together.  In its default mode of options,
       this effectively converts argus(8) files from detail to non-detail mode, and merges periodic flow report records to a single argus  record,
       thus compressing the argus(8) file to a reduced size.

       You can modify the aggregation strategy used by ragator to merge records together, by using the -f ragator.conf option.	See ragator(5) for
       a complete description of the format and syntax of the flow model file.

OPTIONS

       Ragator, like all ra based clients, supports a number of ra options including filtering of input argus records through a terminating filter
       expression.  See ra(1) for a complete description of ra options.

AUTHORS

       Carter Bullard (carter@qosient.com).

SEE ALSO

       ragator(5) ra(1), rarc(5), argus(8) tcpdump(1),

								   21 July 1995 							RAGATOR(1)
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