Use the -B option with grep Post: 302789279

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Top Forums UNIX for Dummies Questions & Answers Use the -B option with grep Post 302789279 by bjdamon on Wednesday 3rd of April 2013 12:00:41 PM

04-03-2013

Registered User

Use the -B option with grep

I am trying to parse out a file using grep - I would like to use the -B option so that the grep command prints the previous 2 lines if/when my string is matched - listed below are two examples - one with the info I want printed to a new file and one with info I want ignored. Any help with the grep -B command structure would be helpful.

Code:

______________________________________________________________________________
CAUAJM_I_50322 Checking Syntax for Inserting/Updating job: q_pm_d_bifind_curr_n2
CAUAJM_E_50442 Invalid attribute value for <priority>: Unexpected end of character string: Pri X--If job fails due to unable to allocate bytes of shared memory",restart. If fails f
or different reason,e-mail Oncall Database Management Production Systems Support.Product Mastering bifind pull for n2
CAUAJM_E_50246 JIL syntax check FAILED

Code:

CAUAJM_I_50322 Checking Syntax for Inserting/Updating job: q_feeds_d_dbqc_release_inact
CAUAJM_I_50247 JIL syntax check PASSED

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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  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)