I need to know if anyone can assist me on how to grab the last (we'll just say "x" minutes) of a log file. How do you tell the grep command without specifying an exact window of time? (So relative instead of absolute.)
Thanks,
Jon (2 Replies)
Dear Guru's
I've a requirment to grep for a string in series of log files that are getting generated almost every minute.
I'm looking to schedule a script every 15 mountes,in order to check if the error string has been generated in any of the log files generated in last 15 minutes.
Please... (3 Replies)
Hi All,
Below script will make a copy of the existing log file with the then timestamp details.
I am looking to create a copy of the existing log file for every 60 minutes and when the file limit reaches to 5, the 6th copy should overwrite the first backedup file which means all the time it... (3 Replies)
I have below command, which i use for checking last two hours log file, but i want to check 30 minutes log and discard old log, only match current time with last 30 minutes. Command i am using. This below attach log file format is for this week, but sometime it got change in time of log, so i need... (6 Replies)
I have a log file with the below contents :
log_file_updated.txt :
Jul 5 03:33:06 rsyslogd: was
Jul 5 03:33:09 adcsdb1 rhsmd: This system is registered.
Sep 2 02:45:48 adcsdb1 UDSAgent: 2015-07-05 04:24:48.959 INFO Worker_Thread_4032813936 Accepted connection from host <unknown>... (3 Replies)
I have newbie,
which i use for checking last one hours log file,
but i want to check 2 minutes log and discard old log, only match current time with last 2 minutes.
Ex log.
2018-07-03 20:09:17
2018-07-03 20:05:17
2018-07-03 20:05:18
2018-07-03 20:05:20
2018-07-03 20:06:22
2018-07-03... (5 Replies)
Hi, please help with below time conversion to minutes.
one column values:
2 minutes 16 seconds 420 msec
43 seconds 750 msec
0 days 3 hours 29 minutes 58 seconds 480 msec
11 seconds 150 msec
I need output in minutes(total elapsed time in minutes) (2 Replies)
Hello all,
Info:
System RedHat 7.5
I need to create a script that based on the creation time,
if the file is older then 5 minutes then execute some stuff, if not exit.
I thought to get the creation time and minutes like this.
CreationTime=$(stat -c %y /tmp/test.log | awk -F" " '{ print... (3 Replies)
Hi Guys,
I am writing a bash script to capture the last 30 minutes's contents from log file to a new file. This job is a scheduled job and will run every 30 minutes. The log file is db2diag.log in DB2. I am having difficulties copying the last 30 minutes's contents. Can someone please help me.... (4 Replies)
Discussion started by: naveed
4 Replies
LEARN ABOUT DEBIAN
poe::filter::grep
POE::Filter::Grep(3pm) User Contributed Perl Documentation POE::Filter::Grep(3pm)NAME
POE::Filter::Grep - select or remove items based on simple rules
SYNOPSIS
#!perl
use POE qw(
Wheel::FollowTail
Filter::Line Filter::Grep Filter::Stackable
);
POE::Session->create(
inline_states => {
_start => sub {
my $parse_input_as_lines = POE::Filter::Line->new();
my $select_sudo_log_lines = POE::Filter::Grep->new(
Put => sub { 1 },
Get => sub {
my $input = shift;
return $input =~ /sudo[d+]/i;
},
);
my $filter_stack = POE::Filter::Stackable->new(
Filters => [
$parse_input_as_lines, # first on get, last on put
$select_sudo_log_lines, # first on put, last on get
]
);
$_[HEAP]{tailor} = POE::Wheel::FollowTail->new(
Filename => "/var/log/system.log",
InputEvent => "got_log_line",
Filter => $filter_stack,
);
},
got_log_line => sub {
print "Log: $_[ARG0]
";
}
}
);
POE::Kernel->run();
exit;
DESCRIPTION
POE::Filter::Grep selects or removes items based on simple tests. It may be used to filter input, output, or both. This filter is named
and modeled after Perl's built-in grep() function.
POE::Filter::Grep is designed to be combined with other filters through POE::Filter::Stackable. In the "SYNOPSIS" example, a filter stack
is created to parse logs as lines and remove all entries that don't pertain to a sudo process. (Or if your glass is half full, the stack
only selects entries that DO mention sudo.)
PUBLIC FILTER METHODS
In addition to the usual POE::Filter methods, POE::Filter::Grep also supports the following.
new
new() constructs a new POE::Filter::Grep object. It must either be called with a single Code parameter, or both a Put and a Get parameter.
The values for Code, Put, and Get are code references that, when invoked, return true to select an item or false to reject it. A Code
function will be used for both input and output, while Get and Put functions allow input and output to be filtered in different ways. The
item in question will be passed as the function's sole parameter.
sub reject_bidoofs {
my $pokemon = shift;
return 1 if $pokemon ne "bidoof";
return;
}
my $gotta_catch_nearly_all = POE::Filter::Grep->new(
Code => &reject_bidoofs,
);
Enforce read-only behavior:
my $read_only = POE::Filter::Grep->new(
Get => sub { 1 },
Put => sub { 0 },
);
modify
modify() changes a POE::Filter::Grep object's behavior at run-time. It accepts the same parameters as new(), and it replaces the existing
tests with new ones.
# Don't give away our Dialgas.
$gotta_catch_nearly_all->modify(
Get => sub { 1 },
Put => sub { return shift() ne "dialga" },
);
SEE ALSO
POE::Filter for more information about filters in general.
POE::Filter::Stackable for more details on stacking filters.
BUGS
None known.
AUTHORS & COPYRIGHTS
The Grep filter was contributed by Dieter Pearcey. Documentation is provided by Rocco Caputo.
Please see the POE manpage for more information about authors and contributors.
perl v5.14.2 2012-05-15 POE::Filter::Grep(3pm)