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Full Discussion: automating file search and replace text
Top Forums Shell Programming and Scripting automating file search and replace text Post 302171168 by Ygor on Wednesday 27th of February 2008 07:47:08 PM
Old 02-27-2008
Try using awk instead of grep and sed, e.g...
Code:
$ head file[12]
==> file1 <==
x=-0.3
y=2.1
z=9.0

==> file2 <==
xx=
yy=
zz=

$ awk 'BEGIN{FS=OFS="="}NR==FNR{a[$1 $1]=$2;next}{print $1,a[$1]}' file1 file2
xx=-0.3
yy=2.1
zz=9.0

 

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LEARN ABOUT LINUX

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 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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