How to ignore white spaces while comparing two files.? Post: 302832465

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Top Forums Shell Programming and Scripting How to ignore white spaces while comparing two files.? Post 302832465 by sharsour on Monday 15th of July 2013 02:57:28 AM

07-15-2013

Registered User

Two things here am looking at matching a smaller set of input file against a big data file and print the contents of input file that is not part of data file.
I am looking for the strict line match. I am ignoring comments with taht regular expression and now i need to ignore the whitespace in between or after the line.

Code:

grep -vxFf datafile inputfile

is the one liner command which is doing job for me. In Awk , it might required to build the big logic to strictly match the lines and need to see also how much time it is taking in comparing file.

This code is working fine, just want to ignore whitespace also as am doing for ignoring comments.

---------- Post updated at 01:57 AM ---------- Previous update was at 01:44 AM ----------

Thanks Milan for your effort.

Actually your suggestion is trimming the spaces in the input file but I want to ingore any spaces while matching the code.

Code:

 
 grep -vxFf $hostFile temp1

sharsour

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zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)

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