Using head and tail:
Without any external commands, it will be very slow on a long file:
Somewhat faster (it uses cat for the second half of the file):
Last edited by cfajohnson; 09-06-2007 at 06:13 PM..
Hi,,,
is there any possibility to install Linux in my P.C which is use Win98 without loose anything from my hard disk????
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Is it better for a newbie in this kind of OS to install Linux instead of... (5 Replies)
hi! how when i'm chattin inside com there was this chatter andi don't know what he did but he saw all my files inside my shell. what did he do? (4 Replies)
A red hat linux ftp server exists in which a file exists. My problem is I need to connect to this server from my windows xp terminal which is in the same network & retrieve the file then convert it to xcel for some data
Pls advs commands and procedure to connect to the machine...oh my god... (1 Reply)
Hello experts,
I have this complicated code that output value in between pattern and add "a string" to the front of the output.
The problems I have many pattern that are the same.
so I want to know how to get the value between 1st pattern, 2nd pattern etc.
Any suggestions?
sed -n... (14 Replies)
I am confused c#t#d#s# once I learn the following :
slice 0 ...... 0 to 2520
slice 1....... 2521 to 2840
slice 6........2841 to 8891
slice 2........0 to 8891
really really confused. Please explain. (8 Replies)
Hello,
I am having a problem with Dual Booting Windows XP Pro and Linux Mint.
I have Three Hard Drives,
One Hard Drive has Linux Mint Loaded on it. When it is hooked up to the computer by itself it works great. This is an IDE Drive.
The Second Hard Drive has Window XP Pro loaded on it.... (3 Replies)
Hi All,
I'm pretty new to this so please bear with me...
I'm trying to write a bash script to first search in a file for a string of characters; if the characters exist than skip the rest of the code until you get to the last line and run that command /sbdin/ldconfig; if the string doesn't... (2 Replies)
Discussion started by: gmdune
2 Replies
LEARN ABOUT DEBIAN
io::async::protocol::linestream
IO::Async::Protocol::LineStream(3pm) User Contributed Perl Documentation IO::Async::Protocol::LineStream(3pm)NAME
"IO::Async::Protocol::LineStream" - stream-based protocols using lines of text
SYNOPSIS
Most likely this class will be subclassed to implement a particular network protocol.
package Net::Async::HelloWorld;
use strict;
use warnings;
use base qw( IO::Async::Protocol::LineStream );
sub on_read_line
{
my $self = shift;
my ( $line ) = @_;
if( $line =~ m/^HELLO (.*)/ ) {
my $name = $1;
$self->invoke_event( on_hello => $name );
}
}
sub send_hello
{
my $self = shift;
my ( $name ) = @_;
$self->write_line( "HELLO $name" );
}
This small example elides such details as error handling, which a real protocol implementation would be likely to contain.
DESCRIPTION EVENTS
The following events are invoked, either using subclass methods or CODE references in parameters:
on_read_line $line
Invoked when a new complete line of input is received.
PARAMETERS
The following named parameters may be passed to "new" or "configure":
on_read_line => CODE
CODE reference for the "on_read_line" event.
METHODS
$lineprotocol->write_line( $text )
Writes a line of text to the transport stream. The text will have the end-of-line marker appended to it; $text should not end with it.
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-10-24 IO::Async::Protocol::LineStream(3pm)