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Full Discussion: Help in unix
Top Forums UNIX for Dummies Questions & Answers Help in unix Post 302196079 by era on Friday 16th of May 2008 04:41:51 PM
Old 05-16-2008
set is not a useful sh command in this context, and you need to avoid having spaces on either side of the equals signs. Also take care to put spaces where you do need them.

Code:
#! /bin/sh

i=0
count=$(wc -l < file2.txt)
while [ $i -le $count ]
do
   i=`expr $i + 3`
   head -n $i file2.txt >> file1.txt
done

As such, simply head -n 3 file2.txt >>file1.txt should do what you want. Or maybe I misunderstand your problem description. Either way, your loop will read from the beginning of file2.txt on each iteration, which doesn't seem useful.
Last edited by era; 05-16-2008 at 05:48 PM.. Reason: Note that head reads first n lines every time
 

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LEARN ABOUT SUSE

xzdiff

XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME

       xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files

SYNOPSIS

       xzcmp [cmp_options] file1 [file2]
       xzdiff [diff_options] file1 [file2]
       lzcmp [cmp_options] file1 [file2]
       lzdiff [diff_options] file1 [file2]

DESCRIPTION

       xzcmp  and  xdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options specified are passed
       directly to cmp or diff.  If only one file is specified, then the files compared are file1 (which must have a suffix of	a  supported  com-
       pression  format)  and  file1 from which the compression format suffix has been stripped.  If two files are specified, then they are uncom-
       pressed if necessary and fed to cmp(1) or diff(1).  The exit status from cmp or diff is preserved.

       The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils.

SEE ALSO

       cmp(1), diff(1), xz(1), gzip(1), bzip2(1), zdiff(1)

BUGS

       Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified.

Tukaani 							    2009-07-05								 XZDIFF(1)
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