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Full Discussion: How to strictly grep (with before and after args) for last N number of occurrences?
Top Forums Shell Programming and Scripting How to strictly grep (with before and after args) for last N number of occurrences? Post 303021699 by stomp on Wednesday 15th of August 2018 04:56:18 AM
Old 08-15-2018
There's no such option. You may check the file twice like this:


Code:
[ "$(grep -c "Authentication Error" MyLogFile.txt)" -ge 2 ] && \
   grep -h -B 1 -A 3 'Authentication Error' MyLogFile.txt | tail -11

 

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LEARN ABOUT XFREE86

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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