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Top Forums UNIX for Dummies Questions & Answers Replace columns from File1 with columns from File2 Post 302309489 by Franklin52 on Wednesday 22nd of April 2009 03:34:28 AM
Old 04-22-2009
I don't see the problem to use a temporary file but you can embed the mv command in your awk command in the END block:

Code:
awk 'NR==FNR{a[NR]=$1;b[NR]=$2;c[NR]=$3;next;}
{$2=a[FNR];$4=b[FNR];$5=c[FNR];print}
END{system("mv temp file1")}' file2 file1 > temp

Regards
 

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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 xzdiff 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(1) or diff(1). If only one file is specified, then the files compared are file1 (which must have a suffix of a supported compression 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(1) or diff(1) 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 2010-09-27 XZDIFF(1)
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