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Top Forums UNIX for Beginners Questions & Answers Filter records from a log file based on timestamp Post 303043164 by mukulverma2408 on Monday 20th of January 2020 10:58:50 AM
Old 01-20-2020
Filter records from a log file based on timestamp

Dear Experts,

I have a log file that contains a timestamp, I would like to filter record from that file based on timestamp. For example refer below file -
cat sample.txt
Code:
Jan 19 20:51:48 mukul-Vostro-14-3468 systemd: pam_unix(systemd-user:session): session opened for user root by (uid=0)
Jan 19 20:54:48 mukul-Vostro-14-3468 su[806]: pam_unix(su:session): session closed for user root
Jan 19 20:57:48 mukul-Vostro-14-3468 systemd-logind[1048]: Removed session c49.
Jan 19 20:59:48 mukul-Vostro-14-3468 su[854]: Successful su for root by root
Jan 19 20:57:48 mukul-Vostro-14-3468 su[854]: + ??? root:root
Jan 19 21:05:48 mukul-Vostro-14-3468 su[854]: pam_unix(su:session): session opened for user root by (uid=0)
Jan 19 21:10:48 mukul-Vostro-14-3468 systemd-logind[1048]: New session c50 of user root.
Jan 19 21:12:48 mukul-Vostro-14-3468 systemd: pam_unix(systemd-user:session): session opened for user root by (uid=0)
Jan 19 21:15:49 mukul-Vostro-14-3468 su[854]: pam_unix(su:session): session closed for user root

Out of this file i would like to filter record before 21:10 hrs.

Any help is appreciated.
 

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Courier::Filter::Logger::File(3pm)			User Contributed Perl Documentation			Courier::Filter::Logger::File(3pm)

NAME
Courier::Filter::Logger::File - File logger for the Courier::Filter framework SYNOPSIS
use Courier::Filter::Logger::File; my $logger = Courier::Filter::Logger::File->new( file_name => $file_name ); # For use in an individual filter module: my $module = Courier::Filter::Module::My->new( ... logger => $logger, ... ); # For use as a global Courier::Filter logger object: my $filter = Courier::Filter->new( ... logger => $logger, ... ); DESCRIPTION
This class is a file logger class for use with Courier::Filter and its filter modules. It is derived from Courier::Filter::Logger::IOHandle. Constructor The following constructor is provided: new(%options): returns Courier::Filter::Logger::File; throws Courier::Error Creates a new logger that logs messages as lines to a file. Opens the file for writing, creating it if necessary. %options is a list of key/value pairs representing any of the following options: file_name Required. The name of the file to which log messages should be written. timestamp A boolean value controlling whether every log message line should be prefixed with a timestamp (in local time, in ISO format). Defaults to false. Instance methods The following instance methods are provided, as inherited from Courier::Filter::Logger::IOHandle: log_error($text): throws Perl exceptions Logs the error message given as $text (a string which may contain newlines). Prefixes each line with a timestamp if the "timestamp" option has been set through the constructor. log_rejected_message($message, $reason): throws Perl exceptions Logs the Courier::Message given as $message as having been rejected due to $reason (a string which may contain newlines). SEE ALSO
Courier::Filter::Logger::IOHandle, Courier::Filter::Logger, Courier::Filter::Overview. For AVAILABILITY, SUPPORT, and LICENSE information, see Courier::Filter::Overview. AUTHOR
Julian Mehnle <julian@mehnle.net> perl v5.14.2 2011-12-27 Courier::Filter::Logger::File(3pm)
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