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Top Forums UNIX for Beginners Questions & Answers Advise to print lines before and after patterh match and checking and removing duplicate files Post 303046122 by jim mcnamara on Friday 24th of April 2020 02:24:21 PM
Old 04-24-2020
IF you had mentioned your OS I could be sure of a better answer -
have you tried grep?
Code:
grep -A 10 -B 10  "CORRUPTION DETECTED" logfilename.log

is one way to it with many, but not all, OSes.

--- Post updated at 13:15 ---

If files are duplicated and assuming you mean what is inside the file is the same then try a cksum

Code:
oldsum=0
oldfile
ls logfile* | 
while read sum size name
do
   if [  "$sum" -eq $oldsum ] ; then
      echo "$oldname and $name are duplicates"
      # put a rm command here after you see this work correctly for you
      # assuming you delete the second file name
      continue
   fi
   oldname=$name
   oldsum=$sum
   
done

--- Post updated at 13:24 ---

try:
Code:
cd /path/to/logs


grep -l "CORRUPTION DETECTED" *.log  |
while read fname
do
   cksum $fname
done | sort -n -k1 > files.tmp
# files.tmp has a sorted list of files - by checksum

Get this working for you , then you can delete identical files.
This User Gave Thanks to jim mcnamara For This Post:
 

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PCREGREP(1)						      General Commands Manual						       PCREGREP(1)

NAME
pcregrep - a grep with Perl-compatible regular expressions. SYNOPSIS
pcregrep [-Vcfhilnrsvx] pattern [file] ... DESCRIPTION
pcregrep searches files for character patterns, in the same way as other grep commands do, but it uses the PCRE regular expression library to support patterns that are compatible with the regular expressions of Perl 5. See pcre(3) for a full description of syntax and semantics. If no files are specified, pcregrep reads the standard input. By default, each line that matches the pattern is copied to the standard out- put, and if there is more than one file, the file name is printed before each line of output. However, there are options that can change how pcregrep behaves. Lines are limited to BUFSIZ characters. BUFSIZ is defined in <stdio.h>. The newline character is removed from the end of each line before it is matched against the pattern. OPTIONS
-V Write the version number of the PCRE library being used to the standard error stream. -c Do not print individual lines; instead just print a count of the number of lines that would otherwise have been printed. If sev- eral files are given, a count is printed for each of them. -ffilename Read patterns from the file, one per line, and match all patterns against each line. There is a maximum of 100 patterns. Trailing white space is removed, and blank lines are ignored. An empty file contains no patterns and therefore matches nothing. -h Suppress printing of filenames when searching multiple files. -i Ignore upper/lower case distinctions during comparisons. -l Instead of printing lines from the files, just print the names of the files containing lines that would have been printed. Each file name is printed once, on a separate line. -n Precede each line by its line number in the file. -r If any file is a directory, recursively scan the files it contains. Without -r a directory is scanned as a normal file. -s Work silently, that is, display nothing except error messages. The exit status indicates whether any matches were found. -v Invert the sense of the match, so that lines which do not match the pattern are now the ones that are found. -x Force the pattern to be anchored (it must start matching at the beginning of the line) and in addition, require it to match the entire line. This is equivalent to having ^ and $ characters at the start and end of each alternative branch in the regular expression. SEE ALSO
pcre(3), Perl 5 documentation DIAGNOSTICS
Exit status is 0 if any matches were found, 1 if no matches were found, and 2 for syntax errors or inacessible files (even if matches were found). AUTHOR
Philip Hazel <ph10@cam.ac.uk> Last updated: 15 August 2001 Copyright (c) 1997-2001 University of Cambridge. PCREGREP(1)

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