I would like to know how to remove lines which has the same pattern as the next line through sed/awk.
I need to display only,
Regards,
Saranya
Moderator's Comments:
edit by bakunin: first off, please open your own thread for your own problem. Second, you have read in the forum rules (you did read the forum rules, didn't you?) that you should use CODE-tags. Please do so!
Hi All,
How can I eliminate the blank lines from a file.
For e.g.
File1 contains
ABCD
EFGH
ZZZZ
HJHH
KJKJ
IUYU
I need the file to be as follows....
ABCD
EFGH (4 Replies)
I have a file abc:
line 1
line 2
line 3
line 4
And I am successfully e-mailing the file, with this:
mail -s "contents of abc" jdoe@email.com <<EOF
cat abc
EOF
But the e-mail shows up looking like this:
subject: contents of abc
line 1 line 2 line 3 line 4
The carriage returns... (5 Replies)
I have a few lines like --
feature 1,
subfeat 0,
type 3,
subtype 1,
value 0,
--
feature 1,
subfeat 0,
type 1,
subtype 1,
value 0,
I would like to concatenate the... (1 Reply)
Hi ,
I'm looking for a way to merge two lines only for a given pattern / condition.
Input :
abcd/dad + -49.201 2.09 -49.5 34 ewrew rewtre *
fdsgfds/dsgf/sdfdsfasdd +
-4.30 0.62 -49.5 45 sdfdsf cvbbv *
sdfds/retret/asdsaddsa +
... (1 Reply)
I have following pattern in a file:
00:01:38 UTC
abcd
00:01:48 UTC
00:01:58 UTC
efgh
00:02:08 UTC
00:02:18 UTC
and I need to change something like the following
00:01:38 UTC
abcd
00:01:48 UTC
XXXX
00:01:58 UTC
efgh
00:02:08 UTC
XXXX (6 Replies)
Ive used this snippet of code on a solaris box thousands of times.
But it isnt working on the new linux box
sed -n '/interface LoopBack0/{N;/ ip address /p;}' *.conf
its driving me nuts !!
Is there something Im missing ? (7 Replies)
I know how to search for a pattern/regular expression in many files that I have in a directory. For example, by doing this:
grep -Ril "News/U.S." .
I can find which files contain the pattern "News/U.S." in a directory.
I am unable to accomplish about how to extend this code so that it can... (1 Reply)
I have a text file with many thousands of lines, a small sample of which looks like this:
InputFile:PS002,003 D -1 5 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 6 6 -1 -1 -1 -1 0 509 0
PS002,003 PSQ 0 1 7 18 1 0 -1 1 1 3 -1 -1 ... (5 Replies)
Discussion started by: jvoot
5 Replies
LEARN ABOUT CENTOS
sys::virt::stream
Sys::Virt::Stream(3) User Contributed Perl Documentation Sys::Virt::Stream(3)NAME
Sys::Virt::Stream - Represent & manage a libvirt stream
DESCRIPTION
The "Sys::Virt::Stream" module represents a stream managed by the virtual machine monitor.
METHODS
my $st Sys::Virt::Stream->new($conn, $flags);
Creates a new data stream, ready for use with a stream based API. The optional $flags parameter can be used to configure the stream as
non-blocking
$st->abort()
Abort I/O on the stream. Either this function or "finish" must be called on any stream which has been activated
$st->finish()
Complete I/O on the stream. Either this function or "abort" must be called on any stream which has been activated
$rv = $st->recv($data, $nbytes)
Receive upto $nbytes worth of data, copying into $data. Returns the number of bytes read, or -2 if I/O would block, or -1 on error.
$rv = $st->send($data, $nbytes)
Send upto $nbytes worth of data, copying from $data. Returns the number of bytes sent, or -2 if I/O would block, or -1 on error.
$st->recv_all($handler)
Receive all data available from the stream, invoking $handler to process the data. The $handler parameter must be a function which
expects three arguments, the $st stream object, a scalar containing the data received and a data byte count. The function should return
the number of bytes processed, or -1 upon error.
$st->send_all($handler)
Send all data produced by $handler to the stream. The $handler parameter must be a function which expects three arguments, the $st
stream object, a scalar which must be filled with data and a maximum data byte count desired. The function should return the number of
bytes filled, 0 on end of file, or -1 upon error
$st->add_callback($events, $coderef)
Register a callback to be invoked whenever the stream has one or more events from $events mask set. The $coderef must be a subroutine
that expects 2 parameters, the original $st object and the new $events mask
$st->update_callback($events)
Change the event mask for a previously registered callback to $events
$st->remove_callback();
Remove a previously registered callback
CONSTANTS
Sys::Virt::Stream::NONBLOCK
Create a stream which will not block when performing I/O
Sys::Virt::Stream::EVENT_READABLE
The stream has data available for read without blocking
Sys::Virt::Stream::EVENT_WRITABLE
The stream has ability to write data without blocking
Sys::Virt::Stream::EVENT_ERROR
An error occurred on the stream
Sys::Virt::Stream::EVENT_HANGUP
The remote end of the stream closed
AUTHORS
Daniel P. Berrange <berrange@redhat.com>
COPYRIGHT
Copyright (C) 2006-2009 Red Hat Copyright (C) 2006-2007 Daniel P. Berrange
LICENSE
This program is free software; you can redistribute it and/or modify it under the terms of either the GNU General Public License as
published by the Free Software Foundation (either version 2 of the License, or at your option any later version), or, the Artistic License,
as specified in the Perl README file.
SEE ALSO
Sys::Virt, Sys::Virt::Error, "http://libvirt.org"
perl v5.16.3 2013-07-30 Sys::Virt::Stream(3)