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Top Forums Shell Programming and Scripting Script to search for a pattern in 30 minutes from a log file Post 302899483 by RudiC on Tuesday 29th of April 2014 12:19:00 PM
Old 04-29-2014
You could save the size of your log file (in bytes) for the next run:
Code:
        skip=$(stat -c%s file)
        dd if=file iflag=skip_bytes skip=$skip 2>/dev/null | grep -E "Struck|Out of Memory"

 

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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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