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Top Forums Shell Programming and Scripting How to use sed to search for string and Print previous two lines and current line Post 302339281 by nmadhuhb on Thursday 30th of July 2009 07:14:34 AM
Old 07-30-2009
How to use sed to search for string and Print previous two lines and current line

Hello,

Can anybody help me to correct my sed syntax to find the string and print previous two lines and current line and next one line.

i am using string as "testing"

netstat -v | sed -n -e '/test/{x;2!p;g;$!N;p;D;}' -e h

i am able to get the previous line current line next line but unable to print the previous to previous line not able to get.

i.e.

this line to print
this line to print
test:This line to print
this line to print.

Can anybody help me


Madhu
 

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cupstestppd(1)							    Apple Inc.							    cupstestppd(1)

NAME
cupstestppd - test conformance of ppd files SYNOPSIS
cupstestppd [ -I category ] [ -R rootdir ] [ -W category ] [ -q ] [-r] [ -v[v] ] filename.ppd[.gz] [ ... filenameN.ppd[.gz] ] cupstestppd [ -R rootdir ] [ -W category ] [ -q ] [-r] [ -v[v] ] - DESCRIPTION
cupstestppd tests the conformance of PPD files to the Adobe PostScript Printer Description file format specification version 4.3. It can also be used to list the supported options and available fonts in a PPD file. The results of testing and any other output are sent to the standard output. The first form of cupstestppd tests one or more PPD files on the command-line. The second form tests the PPD file provided on the standard input. OPTIONS
cupstestppd supports the following options: -I filename Ignores all PCFileName warnings. -I filters Ignores all filter errors. -I profiles Ignores all profile errors. -R rootdir Specifies an alternate root directory for the filter, pre-filter, and other support file checks. -W constraints Report all UIConstraint errors as warnings. -W defaults Except for size-related options, report all default option errors as warnings. -W filters Report all filter errors as warnings. -W profiles Report all profile errors as warnings. -W sizes Report all media size errors as warnings. -W translations Report all translation errors as warnings. -W all Report all of the previous errors as warnings. -W none Report all of the previous errors as errors. -q Specifies that no information should be displayed. -r Relaxes the PPD conformance requirements so that common whitespace, control character, and formatting problems are not treated as hard errors. -v Specifies that detailed conformance testing results should be displayed rather than the concise PASS/FAIL/ERROR status. -vv Specifies that all information in the PPD file should be displayed in addition to the detailed conformance testing results. The -q, -v, and -vv options are mutually exclusive. EXIT STATUS
cupstestppd returns zero on success and non-zero on error. The error codes are as follows: 1 Bad command-line arguments or missing PPD filename. 2 Unable to open or read PPD file. 3 The PPD file contains format errors that cannot be skipped. 4 The PPD file does not conform to the Adobe PPD specification. EXAMPLES
The following command will test all PPD files under the current directory and print the names of each file that does not conform: find . -name *.ppd ! -exec cupstestppd -q '{}' ; -print The next command tests all PPD files under the current directory and print detailed conformance testing results for the files that do not conform: find . -name *.ppd ! -exec cupstestppd -q '{}' ; -exec cupstestppd -v '{}' ; SEE ALSO
lpadmin(8), http://localhost:631/help Adobe PostScript Printer Description File Format Specification, Version 4.3. COPYRIGHT
Copyright 2007-2013 by Apple Inc. 19 November 2009 CUPS cupstestppd(1)
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