Hello:
I'm a very newbee at UNIX/AIX.
What i want to do is to tail a file from the bottom until a certain string is found and write all the lines after the found string to another file.
I've tried out a lot of combination with tail and grep but doesn't find the good one.
Could someone help... (4 Replies)
Hi
i am using grep command to search a string in a file and i am able to find that string in it ..
but moving forward once i find the string i need to remove the 5 lines above that and to remove 2 lines below it .. Just wanted to be clear there should be no lines existing which has a string... (7 Replies)
Hello I am new to this forum and have been perplexed by this issue for the last hour of my life, I've tried to search everywhere for a solution to my syntax error, but here is my code.
grep -wvnf 'noise.dat' sample.out | sort
output:
4:Java Swing
5:Swing Java
6:Software Requirements... (2 Replies)
need help in a command. My requirement is that i m grepping the filename based on a pattern in .tar.gz file and then copying the file into some dir
below is what exactly i want to achieve
step 1: grep -l '30017A6800022D1A' CurrentCollectorMeterReadBackup20081007.tar.gz
step 2: file found... (2 Replies)
On one of my servers, it appears that a bunch of html files got the following code added to it...
I was going to try to remove this line using grep & sed... as sample
grep -lr -e 'apples' *.html | xargs sed -i 's/apples/oranges/g'
I can get the grep portion to work...
grep "<script... (7 Replies)
According to linux hardening guide a PATH variable must not contain . or ..
so i grep the path variable using.
# echo $PATH | grep "."
/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
# echo $PATH | grep ".."... (2 Replies)
Hi,
im working on an assignment (airline ticketing system). im kinda having problems with the search function. i want users to be able to search by departure time or by flight. however, my output displays the whole chunk of data instead of what they are supposedly searching for. appreciate if... (1 Reply)
grep -E '^(++){5}5000' <file_name>
this command searches value 5000 in only 6th column from provided file where pipe ( | )is delimiter which separate columns... can some one plz explain me what '^(++){5}5000' actually does..? :confused: (1 Reply)
i have this line of code that looks for the same file if it is currently running and returns the count.
`ps -eaf -o args | grep -i sfs_pcard_load_file.ksh | grep -v grep | wc -l`
basically it is assigned to a variable
ISRUNNING=`ps -eaf -o args | grep -i sfs_pcard_load_file.ksh |... (6 Replies)
Hi All,
I am looking for grep command to search the following in files of .cpp/.h of a directory and its sub-directories.
1. (char *)
2. (int *)
3. (float *)
Like above pattern i need to search in all the files and list.
I am using for example... for char*/const char*
$egrep -Rwin... (2 Replies)
Discussion started by: vijaya_svk
2 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)