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Operating Systems Solaris How to grep (say)last-3 and next-3 lines of Desired Pattern Post 302255194 by demwz on Thursday 6th of November 2008 04:01:43 AM
Old 11-06-2008
someone else did already
Code:
grep -E -B 19 -A 26 "^pattern +[1-9]" input.file
# or
awk '$1=="pattern" && $2>0{for(i=0;i<19;i++)print a[(i+NR)%19];print;for(i=0;i<26;i++){getline;print}}{a[NR%19]=$0}' input.file

see http://www.tek-tips.com/viewthread.cfm?qid=1214284
 

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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 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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