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Top Forums Shell Programming and Scripting NAWK to remove lines that matches a specific pattern Post 302483004 by sbhuvana20 on Thursday 23rd of December 2010 09:53:35 AM
Old 12-23-2010
NAWK to remove lines that matches a specific pattern

Hi,

I have requirement that I need to split my input file into two files based on a search pattern "abc"

For eg. my input file has below content

abc
defgh
zyx

I need file 1 with
abc

and file2 with
defgh
zyx


I can use grep command to acheive this. But with grep I need to scan the input file twice to get the desired output. Also with huge files grep just hangs the system.

Can you please help me if I can use NAWK for this requirement?


Thanks
 

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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 is used to invoke the grep on compress'ed or gzip'ed files. All options specified are passed directly to grep. If no file is speci- fied, 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 zgrep is invoked as zegrep or zfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. For example: for sh: GREP=fgrep zgrep string files for csh: (setenv GREP fgrep; zgrep string files) AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), egrep(1), fgrep(1), zdiff(1), zmore(1), znew(1), zforce(1), gzip(1), gzexe(1) ZGREP(1)
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